Well it worked with Hillary in 2016 with "but her emails" and now they are trying that again with Biden "but his son's laptop". It just doesn't really have the same impact.
Also, in 2016, Trump still had the benefit of the doubt. I'm confident most people, especially independents, are not interested in another 2016-2020 filled with scandals, obvious lies and another White House turning door where nothing get accomplished.
That said, these countless investigations on the Bidens are actually proving me wrong. In 2019-2020, I was disappointed that Biden was the candidate because I thought since he had been in politics for 45+ years, he had to have been corrupted at some point. But Republicans are proving me wrong. The guy is squeaky clean and I find this really refreshing.
"BoTh SiDe ArE CoRrUpT"
Yeah no, done with your bullshit. I will call you every time I see it now. Open your god damn eyes and start thinking for yourself for once in your life.