A conservative columnist took Sen. J.D. Vance (R-OH) to task Monday for his ‘America First’ stance, arguing that voters should know whether Donald Trump’s running mate thinks past policy choices by the nation’s leaders in the run-up to World War II are mistakes. Calling it “the most important question” that debate moderators should ask during Tuesday night’s vice presidential debate, Daniel Krauthammer wondered out loud in his piece in The Dispatch: “If Vance is so vociferous in arguing that America First today means refusing to aid Ukraine in today’s conflict, does he think America First was …