Not that the vote will stop Obama from implementing it via executive order or having the appropriate agency draft regulations complying with the treaty. Still, it’s good to see the Senate won’t ratify it.
Yes, they can. Please re-read Article II, Section 2, Clause 2 of the Constitution: A treaty can be ratified with as few as 34 "Senators PRESENT." Don't think for a minute Harry Reid wouldn't try it with a minimal quorum.