Statewide opinion polling for the April, May, and June 2008 Democratic Party presidential primaries

This article is a collection of statewide public opinion polls that have been conducted relating to the April, May, and June Democratic presidential primaries, 2008.

Pennsylvania Pennsylvania winner: Hillary Clinton Format: Primary see: Pennsylvania Democratic primary, 2008 Date: April 22, 2008 Delegates at stake 188 Delegates won To be determined

Tracking Polls Poll source Date HighlightsNewsmax/Zogby Tracking Latest Sample size: 675 LV Latest Margin of error: ± 3.8% April 20–21, 2008 Clinton 51%, Obama 41%, Someone else 3%, Not sure 6% April 19–20, 2008 Clinton 48%, Obama 42%, Someone else 4%, Not sure 6% April 18–19, 2008 Clinton 46%, Obama 43%, Someone else 3%, Not sure 8% April 17–18, 2008 Clinton 47%, Obama 42%, Someone else 3%, Not sure 8% April 16–17, 2008 Clinton 47%, Obama 43%, Someone else 2%, Not sure 8% April 15–16, 2008 Clinton 45%, Obama 44%, Someone else 3%, Not sure 9%

Polls Poll source Date HighlightsInsider Advantage/Majority Opinion Sample size: 712 LV Margin of error: ± 3.6% April 21, 2008 Clinton 49%, Obama 42%, Not Sure 9%Newsmax/Zogby Sample size: 675 LV Margin of error: ± 4% April 20–21, 2008 Clinton 51%, Obama 41%, Someone else 3%, Not sure 6%American Research Group Sample size: 600 Margin of error: ± 4% April 20–21, 2008 Clinton 56%, Obama 40%, Other 1%, Undecided 3%Insider Advantage/Majority Opinion Sample size: 747 LV Margin of error: ± 3.4% April 20, 2008 Clinton 49%, Obama 39%, Not Sure 12%Rasmussen Reports Sample size: 722 LV Margin of error: ± 4% April 20, 2008 Clinton 49%, Obama 44%, Not Sure 7%Public Policy Polling Sample size: 2,338 LV Margin of error: ± 2% April 19–20, 2008 Obama 49%, Clinton 46%, Undecided 5%Newsmax/Zogby Sample size: 602 LV Margin of error: ± 4.1% April 19–20, 2008 Clinton 48%, Obama 42%, Someone else 4%, Not sure 6%Suffolk University Sample size: 600 LV Margin of error: ± 4% April 19–20, 2008 Clinton 52%, Obama 42%, Undecided 4%, Refused a response 2%SurveyUSA Sample size: 710 LV Margin of error: ± 3.8% April 18–20, 2008 Clinton 50%, Obama 44%, Other 4%, Undecided 2%Quinnipiac University Sample size: 1,027 LV Margin of error: ± 3.1% April 18–20, 2008 Clinton 51%, Obama 44%, Other 1%, Undecided 4%Strategic Vision Sample size: 1,200 LV Margin of error: ± 3% April 18–20, 2008 Clinton 48%, Obama 41%, Undecided 11%Newsmax/Zogby Sample size: 607 LV Margin of error: ± 4.1% April 18–19, 2008 Clinton 46%, Obama 43%, Someone else 3%, Not sure 8%American Research Group Sample size: 600 Margin of error: ± 4% April 17–19, 2008 Clinton 54%, Obama 41%, Other 1%, Undecided 4%MSNBC/McClatchy/Mason-DixonMSNBC/McClatchy/Mason-Dixon Sample size: 625 LV Margin of error: ± 4% April 17–18, 2008 Clinton 48%, Obama 43%, Undecided 8%Newsmax/Zogby Sample size: 608 LV Margin of error: ± 4.1% April 17–18, 2008 Clinton 47%, Obama 42%, Someone else 3%, Not sure 8%Rasmussen Reports Sample size: 730 LV Margin of error: ± 4% April 17, 2008 Clinton 47%, Obama 44%, 9% UndecidedNewsmax/Zogby Sample size: 602 LV Margin of error: ± 4.1% April 16–17, 2008 Clinton 47%, Obama 43%, Someone else 2%, Not sure 8%Muhlenberg College Sample size: 322 Margin of error: ±5.5% April 10–17, 2008 Clinton 47%, Obama 46%, Undecided 7%Newsmax/Zogby Sample size: 601 LV Margin of error: ± 4.1% April 15–16, 2008 Clinton 45%, Obama 44%, Someone else 3%, Not sure 9%Public Policy Polling Sample size: 1,095 Margin of error: ± 3% April 14–15, 2008 Obama 45%, Clinton 42%, Undecided 13%Rasmussen Reports Sample size: 741 Margin of error: ± 4%April 14, 2008 Clinton 50%, Obama 41%, Undecided 9%SurveyUSA Sample size: 638 Margin of error: ± 3.9% April 12–14, 2008 Clinton 54%, Obama 40%, Other 3%, Undecided 3%Los Angeles Times/Bloomberg Sample size: 623 Margin of error: ± 4% April 10–14, 2008 Clinton 46%, Obama 41%, Other 1%, Undecided 12%Strategic Vision Sample size: 1200 Margin of error: ± 3% April 11–13, 2008 Clinton 49%, Obama 40%, Other/Undecided 11%American Research Group Sample size: 600 Margin of error: ± 4% April 11–13, 2008 Clinton 57%, Obama 37%, Other 2%, Undecided 4%Quinnipiac University Sample size: 2,103 Margin of error: ± 2.1% April 9–13, 2008 Clinton 50%, Obama 44%, Undecided 6%Franklin & Marshall CollegeFranklin & Marshall College Sample size: 367 Margin of error: ±5.1%April 8–13, 2008Clinton 46%, Obama 40%, Undecided 14%Newsmax/Zogby Sample size: 1,002 Margin of error: ± 3.2% April 9–10, 2008 Clinton 47%, Obama 43%, Undecided 10%Susquehanna Polling Sample Size: 500 LV Margin of Error: ± 4.3% April 6–10, 2008 Clinton 40%, Obama 37%, Undecided 18%, Other 4%Temple University Sample size: 583 Margin of error: ± 4% March 27 – April 9, 2008 Clinton 47%, Obama 41%, Undecided 11%InsiderAdvantage Sample size: 681 Margin of error: ± 3.6% April 8, 2008 Clinton 48%, Obama 38%, Undecided 13%Public Policy Polling Sample size: 1,124 Margin of error: ± 2.9% April 7–8, 2008 Clinton 46%, Obama 43%, Undecided 11%Rasmussen Reports Sample size: 695 Margin of error: ± 4%April 7, 2008 Clinton 48%, Obama 43%, Undecided 9%SurveyUSA Sample size: 597 Margin of error: ± 4.1% April 5–7, 2008 Clinton 56%, Obama 38%, Other 4%, Undecided 2%American Research Group Sample size: 600 Margin of error: ± 4% April 5–6, 2008 Clinton 45%, Obama 45%, Other 4%, Undecided 6%Strategic Vision April 4–6, 2008 Clinton 47%, Obama 42%, Undecided 11%Quinnipiac University Sample size: 1,340 Margin of error: ± 2.7% April 3–6, 2008 Clinton 50%, Obama 44%, Other 1%, Undecided 6%Time Magazine Sample size: 676April 2–6, 2008 Clinton 44%, Obama 38%, Undecided 18%Insider Advantage/Majority Opinion Sample size: 659April 3, 2008 Clinton 45%, Obama 42%, Undecided 12%Muhlenberg College Sample size: 406 Margin of error: ±5% March 27 – April 2, 2008 Clinton 49%, Obama 38%, Other 2%, Undecided 11%Public Policy Polling Sample size: 1,224 Margin of error: ± 2.8% March 31 – April 1, 2008 Obama 45%, Clinton 43%, Undecided 13%Rasmussen Reports Sample size: 730 Margin of error: ± 4% March 31, 2008 Clinton 47%, Obama 42%, Undecided 11%Quinnipiac University Sample size: 1,549 Margin of error: ± 2.5% March 24–31, 2008 Clinton 50%, Obama 41%, Other 1%, Undecided 8%Survey USA Sample size: 588 Margin of error: ± 4,1% March 29–31, 2008 Clinton 53%, Obama 41%, Someone else 4%, Undecided 2%Strategic Vision Sampling Size: 504 March 28–30, 2008 Clinton 49%, Obama 41%, Undecided 10%American Research Group Sample size: 600 Margin of error: ± 4% March 26–27, 2008 Clinton 51%, Obama 39%, Other 2%, Undecided 8%Rasmussen Reports Sample size: 690 Margin of error: ± 4% March 24, 2008 Clinton 49%, Obama 39%, Undecided 12%Public Policy Polling Sample size: 597 Margin of error: ± 4% March 15–16, 2008 Clinton 56%, Obama 30%, Undecided 14%Quinnipiac University Sample size: 1,304 Margin of error: ± 2.7% March 10–16, 2008 Clinton 53%, Obama 41%, Other 1%, Undecided 6%Franklin & Marshall CollegeFranklin & Marshall College Sample size: 294 Margin of error: ±5.7%March 11–16, 2008Clinton 51%, Obama 35%, Other 1%, Undecided 13%Rasmussen Reports Sample size: 697 Margin of error: ± 4% March 12, 2008 Clinton 51%, Obama 38%, Undecided 11%Survey USA Sample size: 608 Margin of error: ± 4% March 8–10, 2008 Clinton 55%, Obama 36%, Someone else 5%, Undecided 3%Susquehanna Polling Sample size: 500 March 5–10, 2008 Clinton 45%, Obama 31%, Someone else 4%, Undecided 20%Strategic Vision Sample size: 1,200 Margin of error: ±3% March 7–9, 2008 Clinton 56%, Obama 38%, Undecided 6%American Research Group Sample size: 600 Margin of error: ± 4% March 7–8, 2008 Clinton 52%, Obama 41%, Someone else 1%, Undecided 6%Rasmussen Reports Sample size: 690 Margin of error: ± 4% March 5, 2008 Clinton 52%, Obama 37%, Undecided 11%Rasmussen Reports Sample size: 820 Margin of error: ± 3% February 26, 2008 Clinton 46%, Obama 42%, Undecided 12% ‡Quinnipiac University Sample size: 506 LV Margin of error: ±4.4%February 21–25, 2008Clinton 49%, Obama 43%, Other 1%, Undecided 7% ‡Franklin & Marshall CollegeFranklin & Marshall College Sample size: 303 Margin of error: ±5.6%February 13–18, 2008Clinton 44%, Obama 32%, Other 4%, Undecided 20%Quinnipiac University Sample size: 577 LV Margin of error: ±4.1%February 6–12, 2008Clinton 52%, Obama 36%, Other 1%, Undecided 11%Franklin & Marshall CollegeFranklin & Marshall College Sample size: 627 Margin of error: ±3.9%January 8–14, 2008Clinton 40%, Obama 20%, Edwards 11%, Other 6%, Undecided 23%Quinnipiac University Sample size: 462 Margin of error: ± 4.6% November 23 – December 3, 2007 Clinton 43%, Obama 15%, Edwards 9%, Biden 5%, Kucinich 3%, Richardson 2%, Dodd 1%, Gravel -, Other 2%, undecided 18%Quinnipiac UniversityQuinnipiac University October 31 – November 5, 2007 Clinton 48%, Obama 15%, Edwards 11%, Biden 3%, Richardson 2%, Kucinich 1%, Dodd -, Gravel -, Other 1%, undecided 15%Quinnipiac University October 1–8, 2007 Clinton 41%, Obama 14%, Edwards 11%, Biden 5%, Richardson 3%, Kucinich 3%, Dodd -, Gravel -, Other 2%, undecided 18%Strategic VisionStrategic Vision September 28–30, 2007 Clinton 42%, Obama 24%, Edwards 9%, Richardson 6%, Biden 5%, Dodd 1%, Kucinich 1%, undecided 12%Pennsylvania Keystone PollPennsylvania Keystone Poll August 24 – September 2, 2007 Clinton 38%, Obama 21%, Edwards 17%, Other 6%, Don't Know 18%Quinnipiac University 14–20 August 2007 Clinton 42%, Gore 13%, Obama 12%, Edwards 8%, Biden 4%, Richardson 1%, Kucinich 1%, Dodd -, Gravel -, Other 2%, undecided 16%Quinnipiac UniversityQuinnipiac University July 30–6 August 2007 Clinton 35%, Obama 19%, Gore 12%, Edwards 10%, Biden 2%, Richardson 2%, Kucinich 1%, Dodd -, Gravel -, Other 2%, undecided 15%Strategic Vision (R)Strategic Vision (R) July 6–8, 2007 Clinton 36%, Obama 25%, Edwards 12%, Richardson 8%, Biden 5%, Dodd 1%, Kucinich 1%, undecided 12%Quinnipiac (without Gore) June 22–28, 2007 Clinton 38%, Obama 22%, Edwards 10%, Biden 6%, Richardson 2%, Dodd 1%, Kucinich 1%, Gravel -, Other 2%, undecided 15%Quinnipiac (with Gore) June 22–28, 2007 Clinton 32%, Obama 18%, Gore 16%, Edwards 7%, Biden 5%, Richardson 2%, Dodd 1%, Kucinich 1%, Gravel -, Other 2%, undecided 15%WTAE/Pittsburgh Tribune-Review KeystoneWTAE/Pittsburgh Tribune-Review Keystone May 29 – June 4, 2007 Clinton 40%, Edwards 21%, Obama 18%, Other 3%, Unsure 18%Quinnipiac University May 22–28, 2007 Clinton 33%, Gore 16%, Obama 13%, Edwards 11%, Biden 3%, Richardson 3%, Kucinich 1%, Wesley Clark -, Dodd -, Gravel -, Other 4%, Unsure 16%Strategic Vision (R)Strategic Vision (R) 13–15 April 2007 Clinton 33%, Obama 23%, Edwards 19%, Biden 3%, Richardson 3%, Dodd 1%, Kucinich 1%, undecided 17%Quinnipiac University (without Gore) 19–25 March 2007 Clinton 38%, Obama 24%, Edwards 16%, Biden 6%, Richardson 3%, Clark 0%, Dodd 0%, Gravel 0%, Kucinich 0%, Other 1%, Unsure 11%Quinnipiac University 19–25 March 2007 Clinton 36%, Obama 17%, Gore 13%, Edwards 9%, Biden 4%, Richardson 2%, Clark 0%, Dodd 0%, Gravel 0%, Kucinich 0%, Other 2%, Unsure 16%Strategic VisionStrategic Vision 16–18 March 2007 Clinton 35%, Obama 25%, Edwards 13%, Clark 2%, Biden 3%, Dodd 1%, Kucinich 1%, Richardson 2%, undecided 18%Quinnipiac University 1–5 February 2007 Clinton 37%, Obama 11%, Edwards 11%, Gore 11%, Biden 5%, Dodd 1%, Kucinich 1%, Richardson 1%, Vilsack 1%, Someone Else 2%, Wouldn't Vote 2%, undecided 17%American Research GroupAmerican Research Group 16–22 January 2007 Clinton 32%, Obama 13%, Edwards 12%, Biden 8%, Clark 6%, Dodd 2%, Kerry 2%, Kucinich 2%, Gravel 1%, Richardson 1%, Vilsack 1%, undecided 21%

Indiana Indiana winner: Hillary Clinton Format: Primary see: Indiana Democratic primary, 2008 Date: 6 May 2008 Delegates at stake 72 Delegates won To be determined

The sample set for some polls in this table is not unique and overlaps with polls from previous days. These polls are marked as Tracking Polls. Poll source Date HighlightsZogby International Sample Size: 644 (Tracking)