You can learn a lot about a candidate by looking at where he or she draws the most contributions. Campaign-finance reports are always studied for who raised the most money and who is struggling for support. But looking at a campaign’s fundraising footprint tells a tale all its own.

The Wall Street Journal mapped the top-donating ZIP Codes to several presidential campaigns, which yielded a different way to look at the candidates’ fundraising profiles. Scroll through the maps to see the candidates’ fundraising strongholds.