Well, when they're indicted, give me a ring.
It won't happen, but not because the GOP Senators are gutless, but because violations of Senate ethics rules are not criminal offenses, rather they are matters on which the Senate may act against its members with sanctions ranging from censure (a very formal slap on the wrist) through loss of seniority to expulsion.
In the current atmosphere, I'd be somewhat surprised if the GOP don't do something (assuming they retain the majority), but I'd be very surprise if it's anything much stronger than censure.