The Republican politicians will never do that. They are spineless. Besides, what good would it do? If some Republican congressman obtained video and eyewitness evidence that Joe Biden was killing and eating babies, the news media would cover it all up and deny it ever happened. I'm not saying Biden kills and eats babies, I was just using something utterly repulsive as an example.
Democrats get away with murder but conservatives have their entire lives scrutinized, searching for anything possible to charge them with. That's just how it is in America these days.