Look, BroncoBama doesn't give a rat's rump about the legislation that failed. He's pissed because of WHERE it failed.
He needed the Dem Senate to pass it so it would (as he damned well knew) fail in the GOP House. That then gives him a wedge issue to demagogue relentlessly to get Pelosi back in the Speaker's chair in the 2014 midterms.
With the Senate and House in his pocket for two yrs he gets his agenda/legacy in a walk.
As to the gun legislation, he doesn't GAS. Never did.