You have that reversed. What appears from the last 5-6 years is that anything alleged against Trump is automatically deemed correct and trustworthy, and that no amount of disproof and no amount of misconduct by investigators and political opponents is ever relevant. With ever debunked allegation, another load of accusation follows, and THEN the walls are closing in THIS TIME. His opposition know he's guilt of something, it's just a question of finding it. It doesn't matter that the Russian Collusion debacle was proven to be a hoax, it doesn't matter that there were never contacts with Russian intelligence, it doesn't matter that his tax returns did not reveal fraud or evasion, it does not matter that there was no back channel server, it does not matter that the FBI lied on warrant affidavits to surveill his campaign, it doesn't matter that FBI agents vowed to "stop it" (his election), it doesn't matter that wild allegations were proven to be wrong over and over again. His opponents know he's really guilty of something. So, this time, they have him.