Is something wrong with Trump?

I haven’t had the time to watch this hour-and-a-half-long speech Donald made last night, but everyone I know who did watch it said there was something obviously wrong with him, like he was coked up. Here’s Steve Benen:

Trump wanted to talk about the anti-Semitic image in his recent tweet, and his belief that his campaign shouldn’t have deleted his original message. Trump wanted to talk about the parts of Saddam Hussein’s record he agrees with. Trump wanted to talk about how much he likes the Brexit policy he knows little about.
Trump wanted to accuse his critics of “racial profiling,” a phrase the GOP candidate likes to use, though it’s not clear he knows what it means. Trump wanted to list the various Jewish people he knows personally.
The Washington Post added this gem of a sentence: “At one point he also swatted at a mosquito, then pretended the bug was Clinton and spoke to it.”
The Atlantic’s James Fallows, watching this spectacle unfold, wrote, “It would be rash ever to declare Peak Trump. But really, there is something wrong with this man.” MSNBC’s Chris Hayes added, “I’ve been watching these now for 13 months … and that was the most unhinged thing that I’ve seen from him. It was all over the place. It was like Charlie Sheen during his ‘Winning’ tour.”
And then it got worse.
After the event, Trump took on the role of an online troll, publishing an image from Disney with a six-pointed star, demanding to know why the media isn’t outraged by this.
This probably shouldn’t be necessary, but The New Republic’s Jeet Heer explained, “What Trump fails to realize is that the original tweet was offensive because of the context: The star was placed over money in a message about political corruption, playing to old anti-Semitic tropes about wealthy Jews controlling the political process. (It doesn’t help that the image came from an anti-Semitic message board.) None of that, of course, applies to Frozen.”