“Im not sure if under Calis retard electoral system it is possible Hunter can be replaced on the ballot if he withdraws. “
No, he can’t be removed. He couldn’t be removed even if he died. Hunter says that he is innocent and is going to fight this out, but even if he were to plead guilty and resign, it would behoove every Republican and conservative in CA-50 to vote for Hunter so that he gets reelected and resigns before being sworn in, which would bring on a special election for the term ending on January 3, 2021 (at which a Republican almost certainly would be elected).