The attempt does not have to be successful, but it needs to involve some effort and political capital; not just a throwaway comment here and there. The January 6th shenanigans and constant accusations of voter fraud last time were severe enough to count, since the first involved violence and widespread condemnation, and the latter has cost him the trust of most powerful institutions.

This resolves to a poll of the Manifold community. Moderators get 5 votes each, everyone else gets 1 vote. Voters can interpret "serious attempt" in any reasonable way that matches with the above paragraph.

Resolves N/A if he dies before the last year of his term, and he has not already done something that would qualify.