Donald Trump was widely criticized for replaying old fights with Ted Cruz at a news conference the morning after Trump’s acceptance speech to the Republican convention. It’s true — there was no reason for Trump to rehash (again) and explain (again) his attacks on Cruz’s wife Heidi and father Rafael. Beyond that, Trump also stepped on news coverage of his speech.

But the biggest problem with what Trump did Friday was he showed that, even as he has entered the general election campaign, he cannot move beyond the Republican primaries. Yes, it was a big deal that Trump defeated 16 rivals for the GOP crown. But that’s over, and it’s time to move on, yet Trump can’t seem to.