I don't know if I dare say it!!! but he's been embroilled in an argument for nearly a week now over a sheriffs badge and the Star of David (its a bizarre one even by his standards). It does reveal an interesting insight into his mindset and obsession on minutaie. He's clearly vulnerable to being wound up and distracted which I'm sure the Democrats will play on as we go into the autumn
He's also said he's cutting back his media profile, which has been the subject of much comment. Read into what you will, but there is a feeling in his team (which is only about 30 strong) that he's now doing more damage than good and that his vote might improve a bit if he wasn't charging out and feeling the need to make an ill-informed and alienating comment on every subject that crops up
As a stratgey it sometimes works. Corbyn's poll ratings improve slightly when he keeps out the public eye.
He spent about a week in mid June complaining that the pollsters were deliberately over-sampling Democrats! but it seems that a combination of Ivanka, Eric, and Manafort have convinced him now that they aren't, and that people do think what they do about him. It seems the penny has finally dropped that the rhetoric which can win a Republican nomination won't persuade Democrats to switch. Now that he's fired Corey (let Trump be Trump), Lewandowski, he's being handled more professionally
Mind you, he did seem to indicate that Serena Williams is going to speak at the convention in support of him, so in his mind, that probably establishes his black credentials, just like tweeting a picture of himself eating nachos sealed the deal with the hispanics!