I see this issue as a "damn if you do, damn if you don't" issue.
If this security measure was not in place, and a new act of terrorism (from within or from without) should occur, Obama would obviously be blamed.
If no new act of terrorism occurs, this security measure will continue to be spinned as an infraction of citizens' freedom. . .although it is quite possible that that security measure may already have stopped some act of terrorism.
I am not a big fan of it. . because I think terrorism is jsut a small threat, compare to the every day threats we all face, just by being alive, using our cars for commuting, and "cleaning our guns!"
But, wasn't Obama accused of "being soft on terrorism" a while back? And now that he does something about it, he is bashed for it!
Oh well, luckily, he has broad shoulder and is able to take all the crap that is thrown his way!