Read the headers carefully. Trump re-tweeted someone else's tweet, but would he do so if he doesn't agree with it in the first place? Doubtful.
At the very least, he just sent a shiver down Hillary's spine.
This header: "Donald J. Trump @realDonaldTrump Jul 27 " ?
Or this header: "Donald J. Trump retweeted" ?
The later is a retweet.
I agree that he does endorse Gowdy for AG or it would not be on his Twitter page.