Every time they get into office they change the standards and definitions so they always end up with amazing sounding numbers when they compare to the old way of tracking data the republicans never fuck with
Like how Obama thinks people on unemployment should be counted as employed ahahahaha
For the last ~40 years we've had growth frozen for the median household income consistently across Presidencies. The only exception is a little growth under Clinton, who controlled spending, deregulated, reformed welfare, and ran a budget surplus. Of course, under Clinton the Federal Reserve also pushed the stock market into its greatest bubble of all time, which ended poorly.
JFK and LBJ had good growth... because they were abusing Bretton Woods with a loose monetary policy. Once other countries wised up to what 'Murca was doing, Nixon was the one left holding the bag.
The Eisenhower years were probably the best years of sustainable growth of the Bretton Woods period.
(For the record, I hate both the Dems and Reps.)