"Which political party has had the most politicians convicted of crimes in the last 50 years?"
"According to a comparison of 28 years each of Democratic and Republican administrations from 1961-2016, Republicans scored eighteen times more individuals and entities indicted, thirty-eight times more convictions, and thirty-nine times more individuals who had prison time1. Is there anything else you would like to know?"
Oh wait, that's not bias. The Republican Party demonstrably has a higher number of its members convicted of crime. Simply put, Republican politicians are much more likely to commit crimes than Democrat politicians.