This wouldn't necessarily take a Libertarian to correct.

Remember that a 'tax-and-spend' liberal, Clinton, did pretty well at bringing things back into line. Correcting the slide the other way that resulted when the 'conservatives', who ran on a balanced budget and fiscal responsibility (Remember the 'contract on America'?) took over.

Fact - The the two greatest expansions in the federal deficit have been with people who claimed to be for a balanced budget and fiscal responsibility.

Hint - Claim to be for one thing and then to do everything possible against the cause is pretty much par for the GOP. Go figure.

Hint - This is standard propaganda technique. Hitler claimed to be protecting the German nation from the predations of the Jews. He also claimed to be preventing a war. The left hand distracts while the right hand does the dirty work.

In fact I don't have a whole lot of faith in anyone on the Libertarians ideological side. Elected a Libertarian would have little or no traction with either side. An isolated and hostile president might gridlock a legislative process when there are many things that really need to be done in a short amount of time.