Republicans didn't just start embracing Donald Trump as their presidential nominee this week: In their continued refusal to take action on Barack Obama’s nomination of Merrick Garland to the Supreme Court, they wholeheartedly affirmed their unshakeable commitment to making sure Trump gets to fill Antonin Scalia's vacant seat. That prospect is not only as scary as it is revolting, it also just upped the already stratospheric stakes of this year's elections to even greater heights. Could you imagine Trump picking a nominee?