Looking for our guide to the June 30, 2020, primary? Click here.

Coloradans have begun voting for president as the March 3 primary approaches. They face a wide range of choices, with a large Democratic field still battling for supporters.

The state has switched back to a presidential primary system for both major parties after several cycles of caucuses. Colorado again is aligned with 14 other states and territories holding the election on Super Tuesday.

There’s still time to cast an informed ballot before polls and drop boxes close at 7 p.m. March 3. Here’s a quick guide to get you up to speed before you vote.

Issue guides

Selecting a presidential nominee is about more than their on-stage manner and a few talking points. It’s also about how their views align with voters’. We dug into policy papers and records to compile the positions of the remaining major Democratic candidates and President Donald Trump in three areas of particular interest to Coloradans:

• Where do the candidates stand on gun control?

• Where do the candidates stand on immigration?

• Where do the candidates stand on the environment and public land?

The candidates

Colorado’s ballots list 17 Democrats and six Republicans, but many are no longer active candidates. Trump and all of the remaining five major Democrats have come to Colorado in recent months. The Denver Post has covered every visit, bringing you a flavor of the candidates’ stump speeches and your fellow voters’ impressions. (Note: Amy Klobuchar, Pete Buttigieg and Tom Steyer have since ended their campaigns.)

• Elizabeth Warren piles on Bloomberg at Denver rally, but avoids criticism of Sanders

• Democratic candidate Pete Buttigieg appeals to political middle at Aurora town hall

• Trump makes fun of Democrats, hints at Space Command decision in Colorado Springs visit | PHOTOS: President Donald Trump visits Colorado Springs

• “Realistic” Amy Klobuchar wins voters at Aurora event

• Democratic hopeful Tulsi Gabbard preaches unity, leadership in Colorado Springs

• Joe Biden, speaking to donors in Denver, takes digs at Sanders and Bloomberg

• “He’s changing the conversation”: Bernie Sanders rally draws thousands in Denver

• Presidential hopeful Mike Bloomberg unveils plan to tax the rich as he opens Denver office

• Democratic presidential candidate Tom Steyer says he wants to “restore our democracy” in Denver town hall

The Colorado campaigns

Several Democratic contenders have established Colorado operations to build support in recent months. Here is our reporting on the campaigns.

• Colorado’s presidential primary pits billionaires against the liberal grassroots

• Get ready, Colorado: The 2020 Democratic presidential primary will soon be in your face

Voting information

• County election offices have mailed ballots to voters depending on their affiliation: Democrats and Republicans received ballots only for their party’s presidential contest, while unaffiliated voters, who comprise a plurality of voters, received both ballots, giving them a choice of which primary to participate in. But they can only return one ballot.

• Feb. 25 is the last day the Colorado Secretary of State’s Office recommends sending a ballot back by mail. After that, use a local drop box or deliver it to your county clerk’s office, and be sure to return it by 7 p.m. March 3. You can also vote in person at a vote center; visit www.GoVoteColorado.com to find one near you.

• Colorado allows voter registration through the day of the election, but those who register after Feb. 24 must pick up their ballot in person from a voting center. The state also allows 17-year-olds to participate in the primary if they will turn 18 by the Nov. 3 general election. More voting questions are answered here.

• About other races: Colorado has both a caucus and a primary next month. Here’s how they will work.