It’s a completely different race for Donald Trump now that Joe Biden bowed out and laid the groundwork for Kamala Harris to be the party’s nominee. The Atlantic’s Tim Alberta reported earlier this month how Trump’s top advisers feared a scenario where Trump would have to face off against someone other than Biden. That time has come and Alberta is now reporting some may be questioning the decision to tap JD Vance as Trump’s running mate. “Most striking thing I heard from Trump allies yesterday was the second-guessing of JD Vance — a selection, they acknowledged, that was borne of cockiness, mea…