Donald Trump’s campaign staff reportedly aren’t sure J.D. Vance is the best choice for running mate now that President Joe Biden has officially ended his bid for the 2024 election. According to sources, Trump’s campaign tactics and his choice of Vance were strongly based on the idea that he would be running against Biden — not Vice President Kamala Harris. “Most striking thing I heard from Trump allies yesterday was the second-guessing of J.D. Vance — a selection, they acknowledged, that was [born] of cockiness, meant to run up margins with the base in a blowout rather than persuade swing vote…