I guess that is the question, what counts as dirt?

Having corrupt aides is bad. But there will continue to be people who demand dirt on the actual person in question before considering impeachment.

Most of those people were prosecuted for lying to investigators. Falling into a perjury trap is pretty easy. (see McCabe, Bill Clinton, etc)

Would you like to point to any of those people and link the crimes to Trump some how? What you did is just give a laundry list of cases that could be torn apart individually. Nothing is related back to the core issue of conspiracy/collusion or even obstruction.