She isn't, and she's doing it in spite of the MSM digging up the dirtiest of dirt on her and her trips to the gym. She DGAF. But also think about it like this:
It's easy to fight when you know in your bones you are doing the right shit, and what the outcome is going to be. No telling just how much she's read in on all of it at this point (phone calls with boss, etc.).
It's the same reason I've said from day 1 that AOC was /ourplant/. That woman is so stunningly confident in her sheer stupidity it's beyond absurd. But she's got some gems of comebacks when certain people engage her openly over twitter. Things that a person that's as incredibly stupid as "her persona" couldn't possibly find with 3 years of deep meditation and contemplation.