I am somewhat surprised because he initially stood with Stupak. But he’s a Rat through and through. Unfortunately, he will be bullet proof up here.
I think he stood with Stupak originally because it was a “best case scenario” for him at the time. He could have his cake and eat it, too.
Now it comes down to following his leadership (and whatever carrots or sticks they threw his way). The average congressperson, democrat or republican, when put under pressure, will cave.