I suppose you have to respect the guy's ability to get support from people, despite the fact that not so long ago Harry Reid said, in an on the record meeting, something along the lines of "we have Arlen except when we need him." It's true that he's been behaving better lately, but for his long career that was basically Arlen, a fake moderate who was never quite there when he was needed, and often completely batty on things (like suggesting out of office Clinton should be impeached a second time for the Marc Rich pardon.)
Hopefully enough Dems in the state remember that they've been voting against the guy for decades.