I don’t know, but I somewhat suspect that she let them, or someone, know that she’s going to cover her own ass over Trump’s. She’ll eventually be held for contempt of Congess, whether it’s while Trump is in office or after (assuming there is an after). Maybe she saw the writing on the wall that there will be consequences and got the fuck out while she could. If I’m in charge, she’d still face severe consequences, but I’m not, and I wouldn’t be surprised if she faces next to none now.