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.

Certainly the Republican delegates who came to Cleveland have moved on. The convention was the last possible moment Trump could bask in the glow of winning the nomination, but at the same time it was the moment in which the party’s attention turned 100 percent to winning the general election. Trump didn’t turn with it.

One reason Cruz was received so badly at the convention was that the delegates were ready to leave the fights of the primary season behind. When Cruz showed that he was still nursing resentments from months ago, they blamed him for not getting with the program.

There are 106 days left until the election. Trailing in the polls and out-organized by Democrats, Trump has very little time to put together a winning campaign. The fact that he would spend any time relitigating the past struck Republicans for and against Trump as nothing short of astonishing.