Historically, only three Presidents have been impeached. All of these previous Presidents were taken to trial in the Senate, where the case for impeachment was investigated further, witnesses were called and testimony was taken, plus more digging was done to go where the trail of evidence would lead. There is no trial, if no evidence or witnesses can be called.
The Senate impeachment trial is really about a clean, fair, ethical, and impartial election process, which leads to a just, democratic election in the USA. If senators do not care about foreign interference in US elections, they will vote to hold Trump innocent.
via Senate Trump Impeachment Trial Is Really About Whether Americans Want A Clean, Fair, Ethical And Impartial Presidential Election Process, Free Of Foreign Influence, Or If They Are Ok With Pay To Play Politics, Legal ‘Bribery’, And A Despotic Dictator As Leader, Which Then Leads To Fascism | A Green Road Journal