Where Do We Go From Here...

Yesterday the U.S. Senate voted down DADT, which I find incredibly depressing.  The information below makes the situation seem less dire and more like orchestrated steps in a political dance.  Here is what Andrew Sullivan had on his "Daily Dish":

After what seemed like a reckless decision by Harry Reid to put DADT repeal to a vote before reaching an agreement with Collins to allow enough time for debate, it failed. Now, Collins and Lieberman say they will bring a DADT repeal vote to the floor as a stand-alone measure, which would require House action one more time. I have no idea whether this is viable as a way to save repeal. But one does note that repeal has passed the House, is supported by the military chiefs and defense secretary, has the backing of two-thirds of the American public, and has a 57 - 40 majority in the Senate.

I don't even see how it can be legal to deny people the opportunity to participate in the military.  There must be some Congressional dictate that is a work-around from the protections of the Constitution.