Prosecute him for what? Insurrection? But he told the crowd to “make your voices heard peacefully and patriotically”. He did not lead any breach of the Capitol nor ask anyone to commit any illegal act. Do you have video that shows him doing so? You would need to show his guilt beyond a reasonable doubt. The partisan quickie impeachment, with no evidentiary record, no testimony, and no due process looks more unfair than a Stalinist show trial. In a court of law with procedural protections for the accused, you won’t get far toward making a case.