Why is it Trump's responsibility to investigate? It's the Democrat that brought the charges, so it's the Democrats responsible for proving collusion. While many are saying we don't know what evidence Mueller has, if there was damning evidence against Trump, it would have been leaked. The indictments released this week were leaked last Friday, so the media had ALL weekend to talk about them. Aside from no evidence, Comey said three time, including one time in closed door session with Congress, that Trump WASN'T being investigated. It's beginning to look like those who brought the charges and those investigating are more involved with the Russian's the Trump.