He pulled it because he locked himself out of the room. He went the wrong way, and couldn’t get back in to the vote in time. The Republicans were trying to pull a fast one, and he did manage to delay it, but the ends don’t justify the means.

It was a stupid thing to do, but the real damage to his image was in trying to lie about it and coverit up. If he had said, from the beginning, “the Republicans were trying some bullshit and it was the only way I could stop them” then you could plausibly make that argument. I would still disagree, but I could respect that he did what he thought he had to do.