One can hate or like Biden, but he put it perfectly: This is a prostitution of the presidency. Nothing more, nothing less.
Republicans are willing to look away, and let Trump run rampant, if it means that they'll get their part in return (judges, etc.)
Trump, in turn, will say anything. He has no restrains, and knows this - he can say absolutely anything, and no-one within will do or say anything.
Right now, the presidency (for Trump) is a case of survival. He needs to remain in power, in order to escape whatever civil charges he'll face.
For his own sake, Trump should have never ran for Presidency. He hates his job, and got lost in his own ego.