Pledged nationalconvention delegates Type CD1 9 CD2 9 CD3 5 CD4 5 CD5 4 CD6 6 CD7 6 9 At-large 14 Total pledged delegates 67 The 2020 Colorado Democratic presidential primary took place on March 3, 2020, as one of 15 contests scheduled on Super Tuesday in the Democratic Party primaries for the 2020 presidential election, following the South Carolina primary the weekend before. The Colorado primary, the first in the state since 2000, was a semi-closed primary and awarded 79 delegates towards the 2020 Democratic National Convention, of which 67 were pledged delegates allocated on the basis of the results of the primary.

Senator Bernie Sanders won the primary with 37% of the vote and ultimately received 29 delegates, ahead of former vice president Joe Biden, who won roughly 25% and received 21 delegates. Although former mayor Michael Bloomberg and senator Elizabeth Warren both surpassed the 15% threshold, following their withdrawal from the race in the next two days, the Colorado Democratic Party decided to directly calculate the delegate count without statewide delegates for Bloomberg and Warren, differing from the usual process in most states, where statewide delegates are calculated regularly and later reallocated to remaining candidates. Otherwise Bloomberg and Warren would have won 14 and 12 delegates instead of 9 and 8 delegates, while Sanders and Biden would have had only 24 and 17 delegates.

Sanders also benefited from that procedure after withdrawing in April: while his and Biden's campaign had agreed on Sanders keeping the statewide delegates he had won, the additional 5 statewide delegates he gained through Bloomberg's and Warren's withdrawal would all have been allocated to Biden as the presumptive nominee in accordance with the typical procedure and would have put Biden in front of Sanders with 26 to 24 delegates. Some media estimates, which did not notice the special approach of Colorado Democrats, reported these numbers as the final result.

Procedure Colorado was one of 14 states and one territory holding primaries on March 3, 2020, also known as "Super Tuesday", following the decision of governor Jared Polis to schedule the primary on that date on April 30, 2019. Instead of party-run caucuses Colorado used a state-run primary in 2020 after voters had passed Proposition 107 in 2016, restoring presidential primaries in the state, which had been held from 1992 to 2000 but were abolished in 2000 due to financial reasons, and matching a national trend for primaries.

Voting took place throughout the state until 7:00 p.m. In the semi-closed primary, candidates had to meet a threshold of 15 percent at the congressional district or statewide level in order to be considered viable. The 67 pledged delegates to the 2020 Democratic National Convention were allocated proportionally on the basis of the results of the primary. Of these, between 4 and 9 were allocated to each of the state's 7 congressional districts and another 9 were allocated to party leaders and elected officials (PLEO delegates), in addition to 14 at-large delegates. The Super Tuesday primary as part of Stage I on the primary timetable received no bonus delegates, in order to disperse the primaries between more different date clusters and keep too many states from hoarding on the first shared date or on a March date in general.

Precinct caucuses were held on March 7, 2020, to elect delegates to county conventions, followed by county conventions until April 1, 2020, to designate delegates for the district conventions and the state convention. The district conventions had to convene until April 17, 2020, to choose the district delegates for the national convention. On April 18, 2020, the state convention voted on the 14 at-large and 9 pledged PLEO delegates for the Democratic National Convention. The delegation also included 12 unpledged PLEO delegates: 5 members of the Democratic National Committee, 5 members of Congress (including senator and former candidate Michael Bennet and 4 representatives), the governor Jared Polis, and former DNC chair Roy Romer.

Candidates The following candidates were listed by the Colorado Secretary of State's office as certified on the ballot. Candidates that had filed a formal withdrawal with the office remained on the ballot but were not counted and did not appear in the results.

Running

Joe Biden Michael Bloomberg Roque "Rocky" De La Fuente III Tulsi Gabbard Rita Krichevsky Bernie Sanders Elizabeth Warren Robby Wells

Withdrawn

Cory Booker Deval Patrick Tom Steyer Marianne Williamson Andrew Yang

Formal withdrawal (ineligible)

Michael Bennet Pete Buttigieg John Delaney Amy Klobuchar

Polling

Polling Aggregation Source of poll aggregation Dateupdated Datespolled BernieSanders JoeBiden ElizabethWarren MichaelBloomberg TulsiGabbard Un-decided270 to Win270 to Win March 3, 2020 Feb 24–Mar 2, 2020 29.3% 16.3% 16.0% 15.3% 1.0% 22.1%RealClear PoliticsRealClear Politics March 3, 2020 Insufficient recent polling to supply an average.FiveThirtyEightFiveThirtyEight March 3, 2020 until March 3, 2020 26.8% 18.2% 16.3% 15.8% 0.5% 22.4% Average 28.0% 17.3% 16.2% 15.6% 0.8% 22.1% Colorado primary results (March 3, 2020) 37.0% 24.6% 17.6% 18.5% 1.0% 1.3%

Tabulation of individual polls of the 2020 Colorado Democratic Primary Poll source Date(s)administered Samplesize Margin MichaelBennet JoeBiden MichaelBloomberg PeteButtigieg KamalaHarris JohnHickenlooper BernieSanders ElizabethWarren AndrewYang Other Undecided Mar 2, 2020 Klobuchar withdraws from the raceSwayableSwayable Mar 1–2, 2020 921 (LV) ± 4.0% – 20% 19% 12% – – 29% 12% – 7% –Data for ProgressData for Progress Feb 28–Mar 2, 2020 464 (LV) ± 4.2% – 18% 16% 8% – – 32% 21% – 5% – Mar 1, 2020 Buttigieg withdraws from the raceElucdElucd Feb 26–Mar 1, 2020 561 (LV) ± 4.1% – 10% 9% 10% – –34% 14% – 9% 14%Magellan StrategiesMagellan Strategies Feb 24–25, 2020 500 (LV) ± 4.38% – 11% 11% 12% – –27% 15% – 9% 15%Data for ProgressData for Progress Feb 23–25, 2020 471 (LV) ± 4.7% – 10% 14% 14% – –34% 20% – 7% 1% Feb 11, 2020 New Hampshire primary; Yang and Bennet withdraw from the race Dec 3, 2019 Harris withdraws from the raceEmerson CollegeEmerson College Aug 16–19, 2019 403 (LV) ± 4.8% 1% 25% – 5% 13% –26% 20% 4% 8% – Aug 15, 2019 Hickenlooper withdraws from the racePublic Policy PollingPublic Policy Polling Jul 12–14, 2019 519 (LV) – 5%22% – 7% 9% 7% 15% 19% 0% 14% –

Results

The results were certified on March 30. The race was called for Bernie Sanders who won a plurality of votes and delegates.

2020 Colorado Democratic presidential primary Candidate Votes % Delegates Bernie Sanders 355,293 37.00 29 Joe Biden 236,565 24.64 21 Michael Bloomberg 177,727 18.51 9 Elizabeth Warren 168,695 17.57 8 Tulsi Gabbard 10,037 1.05 rowspan="7" Andrew Yang (withdrawn) 3,988 0.42 Tom Steyer (withdrawn) 3,323 0.35 Cory Booker (withdrawn) 1,276 0.13 Marianne Williamson (withdrawn) 1,086 0.11 Deval Patrick (withdrawn) 227 0.02 Other candidates 1,911 0.20 Total 960,128 100% 67

Results by county +2020 Colorado Democratic primary