Same exact playbook as every other Trump scandal, smear the person making the accusation (even if they are Republican) and blame the Dems instead, and y'all swallow the hook like good little Trumpies every single time. This way, instead of dealing with anything Trump did, his supporters can just throw mirroring accusations back without a care in the world for how credible they are, the point is they get to dodge talking about Trump's actions and fire back accusations instead. Again, just like every other Trump scandal. I don't fault Republicans for doing it, I fault the dumbasses that support them for letting it work.
Trump and Giuliani have basically admitted that they told Ukraine to investigate Biden or they won't get the Defense funds Congress appropriated (i.e. a clear quid pro quo arrangement), so of course y'all morons dip back into the well of Peter Schweitzer to blame Dems instead. Nevermind that Schweitzer's previous accusations predictably turned out to be partisan nonsense (eg Uranium-1, or the Clinton Foundation investigation McCabe is in hot water for).
Y'all think Biden is corrupt? Maybe. He can share a prison cell with the corrupt piece of sht that is Donald Trump if it's true, but just because Peter Schweitzer wrote it in a book (the accusation comes from Clinton Cash in case people weren't aware, and I thought it was criminal bordering on treason according to Repubs to investigate claims coming from a 3rd party like Schweitzer/Steele?) doesn't make it true, and quite frankly whether the accusation against Trump is true or not the administration is actively and openly engaged in covering up whatever did happen.