In the interest of political gamesmanship, how long do you think he could get away with adorning them? Given the political climate and our current President, could such a maneuver be used as a last desperate act around impeachment?
It specifically says "... as he shall think proper;" So the President would decide how long. In theory that could be for the remainder of his Presidency. Of course that's not realistic, but could he do it long enough to change the vote? Adjourn them for 1 or 2 weeks to work on changing the vote in the House?