Gosh, I wonder why? Who could have guessed that would happen? Republican voters with a college degree and a built-in skepticism of Donald Trump were supposed to form the backbone of Ron DeSantis’ strategy to win the 2024 GOP presidential primary. Instead, they’re leaving his campaign in droves. A trio of Republican primary polls, including previously unpublished data obtained by McClatchyDC, show that Florida’s governor has suffered steep declines in support among GOP voters with at least a bachelor’s degree, an erosion that threatens to undermine his candidacy. Their defections — which started in the spring and have continued this summer — are disproportionately responsible for DeSantis’ overall decline in the race, where polls show he now sits a distant second place to Trump. In all three surveys, the governor now has barely half the support with college-educated white voters that he did when the year began, larger drop-offs than he suffered with other demographic groups. The numbers reflect a pressing problem for the Florida Republican as he seeks to reset his campaign amid fundraising concerns and flagging poll numbers, challenging him to recover the lost support among voters who once made him Trump’s top rival for the nomination. The national surveys paint a troubling picture for his campaign, even as his allies insist that recent state-level polling already shows his candidacy regaining momentum. A poll from decision intelligence company Morning Consult, for instance, found that DeSantis’ support had dropped 18 points among white college-educated Republicans, from 41% when the…