Despite a ruling in Colorado that found Donald Trump can remain on the 2024 ballot even though his actions on Jan. 6 effectively made him an insurrectionist, a law professor from the University of Notre Dame has filed a legal brief citing past cases that blocked presidential candidates from the vote, Newsweek reported. Derek T. Muller cited the 1968 case of former Black Panther leader Eldridge Cleaver who ran for president for the Peace and Freedom Party. California excluded Cleaver from the ballot because he was below the 35-year-old minimum age limit for the presidency — despite arguments th…