Nvidia is a Delaware company. Under Delaware law a board can remove its CEO by majority vote, for any reason or for no reason.

The board can't remove him from the board. That would take a shareholder vote, but Jensen also doesn't own enough shares to block a vote.

> board of directors have no jurisdiction to investigate an "influence operation on their CEO", and even if they did, they have no power to do anything about it

They don't need to, but of course they can. You hire investigators and an outside law firm to dig stuff up.