That constitution thingy, well, it just doesn't apply here according to Secretary of State Hillary Clinton, because an international agreement trumps it, which will come as quite a surprise to the Americans who have to fight it, and the rest of us who have to pay for it. But hey, who cares, they're all volunteers, right?
Peter Wehner for Commentary reminds Hillary Clinton that when it comes to unilateral wars, she at least got to vote for the last one:
On October 10-11, 2002, the House voted 296-133 in favor of the Use of Force Resolution, while the vote in the Senate was 77-23. All told, 110 Democrats in the House and Senate voted in favor of going to war – including then-Senator Hillary Clinton . . ..
The rest is also instructive, here.