DADT could be demolished with the stroke of President Obama's pen. His idiot, frat boy predecessor (W), did a lot of work to establish the principle of the 'Unitary Presidency', a doctrine which essentially says that, in times of war, the President has unlimited power to unilaterally dictate any policy which might affect the conduct of the war. W used it to justify torture, war crimes, and illegal spying on Americans. Just once it would be nice to see a president make an assertion of the office's power for a cause that is good and just.
On this one, Obama can not credibly blame obstructionist Republicans. He is being stopped only his timidity and unwillingness to take stands when it matters. In a word, I am afraid and horribly disappointed to see that we again have a spineless coward in the Oval Office. (That is, however, better than having an idiotic, criminal, spineless coward - as we did from January 2001 until January 2009.)