Your assuming that security theater, a large target for public's anger, and a ready source of media distractions aren't all very valuable tools for The Office of the President.
It's not like there's a lack of deserving decoys out there. However, the TSA has the advantage of "reaching out and touching" people literally by the multi-millions. The current situation was put in place by George W. as well. They may be the best outrageous government agency the current administration could hope for to look good by comparison to.
1984 was a very good instruction manual.