It's probably just easier to say, "Fine. She's insane and I'd still vote for her over Trump."
There's absolutely nothing that even slightly points to Hillary being insane. She may have mental issues, I don't know or care, but the fact that she's running a successful campaign is a pretty good indicator she's not insane. The fact she dresses herself, and doesn't answer policy questions with, "dogs don't like banana's...SHUT UP SQUIRRELS!!" Those are pretty good signs that she's got her head together.
Look at Trump, he's not insane by any stretch of the imagination. A racist, bigot, degenerate moron, but not insane.