Republicans were caught urging their fellow Republicans to show up for the Nevada Democratic caucus yesterday, to vote for Bernie Sanders.
This is possible because while the Democratic caucus in Nevada was Saturday, the Republican caucus is Tuesday. Furthermore, while the Democrats allow same day registration, the Republicans already closed their voter rolls. So if someone is currently registered as a Republican, they could have shown up at a Democratic caucus and changed their registration to Democrat and participated in the caucus. The Republicans will not have changed their registration by Tuesday, so they could also participate in a second caucus.
Of course, we already know that Hillary Clinton has won the Nevada caucus.
Furthermore, the Nevada Democratic party has announced that they will prosecute anyone who commits voter fraud, which is what this is.
So much for GOP claims to care about preventing voter fraud.