Well, he knew what he was signing up for when he agreed to be Trump’s running mate. This is the price he has to pay to make everyone know his name well enough to vote for him in the 2020 primaries, which I’m sure is the big picture. Contrasted with Trump’s craziness, he looks like a very reasonable, put-together candidate — and the contrast makes him look much more moderate than he actually is, because he’s the only sane person on the ticket. He’s already got establishment Republicans writing his name in this time for President, so he’ll have a decent shot at grabbing the nomination next time around. In the meantime, I’m sure Trump’s antics are driving him absolutely nuts.