Why the Republican Party's tactics make perfect sense from their standpoint
The nice thing for the Republicans about believing what they believe- that the problem with America today is that the government does too much for most Americans (and not enough for business owners and other rich people )- is that, once in office, they don't actually have to propose any new policies or even come up with actual ideas for policies. Why? Because they've already gotten most of what they've wanted.
Ever since the Reagan years, economic, social, and racial inequality have all increased, the whole political spectrum has swung to the Right, lliberals are constantly on the defensive, words like "liberal" and "feminist" are dirty words for a lot of Americans, and the mainstream media and the corporations that back them are being driven ever right by the craziness of Fox News and talk radio. They've gotten what they wanted, in more ways than one. Now, they're doing their damndest to *get rid of* policies and programs that they DON'T want.
Once in office, all Republicans have to do is throw red meat out to their True Believers (like voting to repeal Obamacare every other week, or investigating Benghazi to find out WHAT REALLY HAPPENED, or petitioning to put Ronald Reagan's face on Mount Rushmore...OK, I doubt that that last one is true, but you never know!) and they'll get voted back in, time and time again. Haven't we seen a lot of this from Tea Partiers and right-wingers? "The problem with the government is government itself!" "The less they do, the better off America is!" "Gridlock is GOOD!' etc.
Remember, this is a party that-at least, nowadays-prides itself on its lack of legislative accomplishments. You can't fix an organization when most of their members and leaders believe that the only issue is that they haven't doubled down enough on their current tactics.