There's little doubt that this'll pass the Senate. I think it will even get above 60 votes, but I'm not seeing it get to 70.
Unless things change fast and the President is extremely convincing in his speech to the nation, this will easily fail in the House. Members of Congress are getting calls nearly unanimously opposed to strikes. You can't underestimate the effect of that. I think I said a few days ago that at that time it would have been no more than 180 in support. That number may have actually dropped to 160-170. A strong majority of Republicans are not going to support this. If even a simple majority of Democrats oppose it as well (as may very well happen). this resolution will be defeated decisively in the House. Party leadership simply does not have enough control over votes on issues of war. This is an issue where conscience has supremacy over party.
I doubt they'll get to 60 in the Senate unless Obama's speech is a game changer. There are too many Democrats coming out against it.