Republicans need to quit acting like superior persons. It makes no difference if he steps down, except to perpetuate the idea that Republicans have higher morals because our people step aside.
For Democrats it’s all about winning. Republicans need to take the same attitude, and come out and say “we don’t claim to be infallible”.
As a Democrat would say, “has this affected the job he has done? No.”
Besides that, I don't believe that druggies are capable of the degree of rational thought or making the correct decisions based on what's best for the nation if they've been willing to compromise their authority.