Calling other candidates names and shouting out things like “liar”, “the devil”, etc. is juvenile and classless regardless of what party affiliation a candidate is.
During the time of Lincoln, the debates between him and Douglass were articulate and hard-hitting. Profanity, pejoratives, screaming, and hysteria are not the way I want a leader to act.
Yet, as was recalled upthread, about that same time a sitting senator clubbed another sitting senator like a baby seal on the floor of the senate. This is nothing.