Ohio would have to prove that the voters who changed party affiliation were not sincere at the moment they changed. Can’t be done.
Easy as pie. The Ohio version of Ronnie Earl convenes a Grand Jury and subpoenas some of the crossovers. After a throughout legal colonscopy at least a few will admit what they did, especially in exchange for immunity. Then all it takes is for one or two to admit they did it because they listened to Rush.
Maybe Rush won't get indicted, but a grand jury can still issue a report "blaming" him for inciting voter fraud.
Then, the Dems use that report in November to say "see what those evil Republicans did in our primary" and swing the state Dem.
This is why I have no sympathy for Rush. He's playing with fire and, after all his troubles in Florida he, of all people ought to know how dangerous a partisan special prosecutor can be.