Alabama’s Richard Shelby among few senators to have participated in three impeachments Updated Feb 03, 2021; Facebook Share The second impeachment trial of former President Donald Trump is bringing back college memories for Angi Stalnaker and a lesson she learned from a beloved political science professor at the University of Alabama. She recalled her professor, Bill Stewart, writing down the names of the Republican and Democratic senators who, prior to the 1999 impeachment trial of President Bill Clinton, indicated how they would vote before the trial started. Those who did have their minds made up beforehand, Stalnaker recalls Stewart saying, “violated their oaths.”