To play devil’s advocate, and I say this as a neo-Classicist economist (well, what I remember from my study all those years ago at least), the last 8 years weren’t exactly Keyenesian. The last 8 years were graft and bribery pretending to be Keyenesian.
The Obama stimulus effort with the support of the DemonRATs in Congress, was a Keyenesian effort to stimulate the economy back to recovery. Such an effort was tried by FDR to bring America out of the Great Depression. All it did was drag out the Depression. World War II brought America back with great pain: The sacrifice of 419,000 deaths.