There is away to remove someone and it's fully explained in Robert's Rules of Order if not in your by-laws which sounds like are a "well keep secret!"
Robert's Rules is a handbook regarding parliamen-tary procedures. Most copies are printed with a red cover and you can either go to the web site
Roberts Rules of Order
and ask this very question on their discussion forum (very quick answers to I may add). Your other option may be a call for a new election without impeaching the current President.
Please do talk with the Principal and make sure they are included in the discussion/plans. Yes, this is a parent group BUT it's the Principal's school/job.
In the meantime I suppose if "Bozo" wants to run the circus, what can you do but to let her. She is the one that will end up looking "bad" in the lng run and hurting herself. If you are unable to "get rid of her" is there a group of parents ready to step up and help when the time comes? This needs to be thought about, too.
UGH, it's only September!! Come to Denver, our Pres, this year, is a hoot and I need the help!