In Republican circles -- with the notable exception of the man who leads the party -- the debate about masks is over: It’s time to put one on. As a surge of infections hammers the South and West, GOP officials are pushing back against the notion that masks are about politics, as President Donald Trump suggests, and telling Americans they can help save lives. Sen. Lamar Alexander, a Tennessee Republican, on Tuesday bluntly called on Trump to start wearing a mask, at least some of the time, to set a good example. “Unfortunately, this simple, lifesaving practice has become part of a political debate that says: If you’re for Trump, you don’t wear a mask. If you’re against Trump, you do,” Alexander said.