Regarding Impeachment: "In many cases it will connect itself with the pre-existing factions, and will enlist all their animosities, partialities, influence, and interest on one side or on the other; and in such cases there will always be the greatest danger that the decision will be regulated more by the comparative strength of parties, than by the real demonstrations of innocence or guilt."
Hamilton arguing in his essay that the Senate, presided over by the Chief Justice, is the current best solution to overcome the above-mentioned problem with impeachment.
"Where else than in the Senate could have been found a tribunal sufficiently dignified, or sufficiently independent? What other body would be likely to feel CONFIDENCE ENOUGH IN ITS OWN SITUATION, to preserve, unawed and uninfluenced, the necessary impartiality between an INDIVIDUAL accused, and the REPRESENTATIVES OF THE PEOPLE, HIS ACCUSERS?"
https://avalon.law.yale.edu/18th_century/fed65.asp