Even if every one of Schiff’s accusations are true - so what? Gathering and using political dirt against one’s opponents isn’t a crime, much less than an impeachable offense.
Democrats are maligning Trump unfairly for doing what all politicians do. Its their stock in trade.
Why are we here in the Senate today?
Trump certainly had probable cause to investigate the Bidens, starting with Biden’s own public statement that he got the prosecutor investigating his family fired by threatening to withhold American aid (the same thing Trump is falsely accused of—Biden admitted he actually did it). That should end it right there.