https://www.creditsesame.com/blog/clinton-vs-trump-whose-supporters-are-more-financially-savvy/
In other words, Clinton supporters are much more likely to pay the bills in full rather than borrow--so they don't care about the interest rate.
The areas where the two groups differ the most? Credit card rewards and interest. Thirty-three percent of Clinton voters say they use credit cards that pay points or other rewards, and 24 percent say they prefer cash back. Only 11 percent say they take advantage of low interest credit cards.
Over on Team Trump, 25 percent say they use cards that offer points or miles while 26 percent choose cash back cards. Low interest cards are popular among 18 percent of his supporters.
In other words, Clinton supporters are much more likely to pay the bills in full rather than borrow--so they don't care about the interest rate.