Are the RNC and GOP waiting until after Bernie gets the nomination to ramp up attacks on him as a Marxist socialist?

That's their plan. May not work though.

Wont work.

Polls have come out stating that if Bernie Sanders wins the Democratic nomination, he will easily wipe the floor with every single Republican nominee in the general election.

Bernie's biggest obstacle and threat is actually Hillary Clinton.

Bernie has ALREADY identified himself as a Socialist. This isn't news.

Yes, the GOP is spending all its time trying to destroy each other so that either Democrat candidate can win, the GOP is ran by people who are so incompetent that all they want to do is maintain the status quo so that all the politicians keep their jobs.

No;

We believe the American people isn't wanting anything to do with socialism in government.

That would be a waste of money

Everyone, including the DNC, knows he can't get elected