There's really no easy way to put this, just fun to think about the different scenarios. Of course Hillary could be very popular or Kasich, Rubio decide to govern in a more inclusive way than the GOP base wants. Restoring the Bush tax cuts would be a Democratic talking point, especially if Jeb tried that. If we had a recession under Jeb, the GOP would be absolutely destroyed.
The Bush Tax Cuts are still there for households making under 450,000 dollars a year.
True usually if there is a recession the party in power usually loses. Look at Carter in 1980, Bush H.W. in 1992, and John McCain in 2008 when Bush W. was still in the White House. I think Eisenhower escaped a recession though didn't he to get re-elected in 1956?