U.S. economic performance under Democratic and Republican presidents
Blinder and Watson found that the US unemployment rate fell under Democratic Presidents by an average of 0.8%, while it increased under Republican Presidents by an average of 1.1%.  Journalist Andrew Soergel wrote in U.S. News & World Report in October 2015 that ever since John F. Kennedy's Presidency, the unemployment rate was lower at the end of every Democrat's Presidency than at the start of it whereas this is only true for Ronald Reagan among Republican US Presidents during the same time period. (Soergel's statement here is slightly wrong since the US unemployment rate was exactly the same–at 7.5%–at both the start and the end of Democrat Jimmy Carter's Presidency.)