There is a plausible narrative that she hates the Administration so much that she specifically found a job with access to top secret documents with the aim of disseminating them.
Although you would think that when applying for a job that requires security clearance (even though she already had clearance), you would at least try to scrub your history, at the very least, you'd remove your retweets of Edward Fucking Snowden and Iranian politicians.
Did anyone do even a cursory check of her social media? I thought that's what most employers did these days before hiring people.