It’s way too early to think about the 2020 presidential primaries — too early for normal people, that is. But that hasn’t stopped politicians in both parties from doing just that. And yes, that includes Republicans, many of whom are already pondering who might challenge President Trump for the GOP nomination three years from now.
“I don’t see how we can avoid it,” Vin Weber, a former Republican congressman, told me recently. “It’s pretty clear someone’s going to do it.”
“I think he’s inviting one," Sen. Jeff Flake of Arizona, one of Trump’s GOP critics, said last month.
“There should and will be a challenge,” agreed William Kristol, editor at large of the...