Search for your ZIP code or click on candidates’ names to see where they drew the most support. Read our full story for a deeper dive based on the data through the end of 2019, and read how we found and analyzed the data

How we crunched the numbers

Reported dollar amounts are sums of campaign contributions reported to the Federal Election Commission. This analysis combined contributions individuals gave directly to campaigns and contributions that went through the conduits ActBlue, which raises money for Democratic candidates, and the Republican-oriented WinRed.

The analysis included all Democratic candidates who were in the Dec. 19 debate, minus those who have dropped out before this project published Feb. 26, plus President Trump. Contribution totals are from 2017 through the end of January 2020. (Mike Bloomberg is financing his own campaign, and records show he has received no contributions.)

The Chronicle combined reports from campaigns, ActBlue and WinRed to generate total figures for each candidate, then weeded out duplicated donations.

The map, tables and charts include contributions made from Jan. 1, 2017, through Jan. 31, 2020, to candidates and the organizations ActBlue and WinRed. All campaigns and ActBlue, which raises money for Democratic candidates, will file contribution reports monthly in 2020. WinRed, which raises donations for Republicans, will file quarterly. As a result, totals for President Trump's campaign may be undercounted until the end of March. Data will be added as they become available and can be processed.