p.s.I'm kind of enamored of the second link above because in tandem with NCD's points here and also with his reaction on guns and reactions on DACA/immigration et.al., I got a moment of great clarity from this:

Trump then slammed mainstream media reporters for hailing the historic nature of the agreement immediately after its announcement and then, in his eyes, saying the next morning that anyone could make such a deal.

"Then, I get up in the morning, same people, they're saying not that big of a deal, anybody could have done it," Trump said of the coverage. "'Obama could have done it.' ... Obama couldn't have done it."

Earlier Saturday, Trump tweeted his optimism about the new policy, highlighting his recent conversations with Japanese Prime Minister Shinzo Abe and Chinese President Xi Jinping, both of whom he said have been supportive of the efforts [....]

What he wants is actually very simple: he wants to do things that no other president has done! He doesn't care what they are as long as they are major changes and he gets all the credit. He doesn't want any political party to get the credit: great mind, great deal maker, one for the history books,like Julius Caesar. Therefore the accusation that a foreign country helped him become president drives him nuts. Ridiculous, look how the emporer Trump slayed all those puny dummies in the primary, and crooked Hillary, look how he stalked and slayed her, see the adoring crowds from inauguration through this very day, why aren't "they" reporting that?

Edit to add P.P.S:. Ran across several articles pointing out that he was not really endorsing any candidate for PA. 18 in his PA speech, only himself. Fits.