If they want to win by tanking the economy -- killing our credit rating and fighting every Obama initiative to get our economy in gear, that's legitimate -- craven, but legitimate. And if they want to spend yacht-loads of their uber-rich supporters' cash on false advertising, that doesn't frighten me either. If they want to pursue an ideology in which government is always evil, that's also fair game.
Republicans have the right to sell out their power to their uber-rich supporters as payoff for further rigging the tax structure so that the "one percenters" don't have to pay their fair share in taxes. If, as Romney and Ryan have proposed, that the one percenters should get another $300,000 each a year, and they can con people into voting for it, so be it. They also have every right to swindle middle class people into voting against their own interests if they can; in America, you can believe whatever you want, no matter how stupid. Such action may be morally wrong, but it's totally fair.
The truly frightening tactic, however, is their effort to thwart the constitutional RIGHT to vote. Several Republicans have been actually quoted as saying that voting is a PRIVILEGE. Although forgetting grade school civics is not a crime, ignoring or thwarting the constitution is. Voting is not a privilege; voting is a right.
They don't have the right to take away other citizens' right to vote.