In my 58 year experience in politics, I have found that one thing that is learned by practicing politicians is to be careful and precise in the language used in a campaign. If one does not, then the candidate leaves oneself open to misconstruction of what is said. And opponents will leap at the opportunity.
The prior two posts talk about how Donald Trump has broken all of the rules of politics, and yet he has emerged as the nominee of the Republican Party for the office of President of the United States. Given the circumstances, that is an amazing feat for someone who is clearly a novice at retail politics.
Once he secured the nomination, he needed to pivot a bit away from the style of campaign he had been running. During the primaries, the media really gave him a lot of exposure that other Republican candidates didn't get. The reason, of course, is that the media is almost entirely Democratic, and they viewed Trump as the easiest for their candidate to beat.
Prior to the nomination, Trump's approach to the campaign was more conversational than a prepared group of talking points. When he spoke, it was right off the top of his head. He talked more like he was having a conversation at a cocktail party (after a couple of hours of drinking). His statements were broad and imprecise. He got away with it because the press let him.
Trump's big mistake has been not realizing that the minute he got the nomination, the press would turn on him with great vigor. He should have seen it coming, but he clearly did not.
Instead of turning his attention toward Hillary and Obama, the morning after he attacked Ted Cruz. Then he gets involved with criticizing the Khans.
He has not seen yet that he must have some discipline over his mouth or let the media destroy him. They will happily do so, and are proceeding with that as I write.
Every undisciplined thing he says will be parsed, misconstrued, and misquoted by almost every media outlet in the world.
Get smart, Mr. Trump. Put a governor on your mouth. Get on message and stay there. Let petty stuff go. You are on the big stage now. Act like it, or you will make Hillary Clinton the next President of the United States.