I don't know that it's AA specific. Someone reported 90-120 minute waits for regular security last night at ATL (a DL hub). MDW had the video of the lines midweek. EWR has reported bad lines off and on for months.

Upthread I referenced TSA incompetence, but I really do think this is intentional now. And it feels like one day it's DL, next day AA, next day UA, next day WN, etc. It's almost like TSA is rotating through airports so that no airline can accuse the TSA of targeting them specifically.