As I recall, at some point in the last ten years the US government actually repealed a lot of the regulations that had been put in place after the Stock Market Crash of 1929 that was aimed at keeping the Real Estate market healthy (part of what contributed to the crash).
Estimating a bit because the graph is small and my eyes are old -
1940-45 FDR, Democrat (.5T to 2.5T) +2T
1945-53 Truman, Democrat (2.5T-1.75T) -.75T
1953-61, Eisenhower, Republican (1.75T-1.75T) 0
1961-63, JFK, Democrat (1.75T-1.75T) 0
1963-69, LBJ, Democrat (1.75T-1.75T) 0
1969-74, Nixon, Republican (1.75T-1.75T) 0
1974-77, Ford, Republican (1.75T-2.0T) +.25T
1977-81, Carter, Democrat (2.0T-2.0T) 0
1981-89, Regan, Republican (2.0T-4.2T) +2.2T
1989-93, Bush, Republican (4.2T-5.5T) +1.3T
1993-2001, Clinton, Democrat (5.5T-5.5T) 0
01-09, GWBush, Republican (5.5T-7.5T) +2.0T
09- , Obama, Democrat (7.5T-???)