Starting in 1960, there is a recession every time the parties change power.
Eisenhower(R) ==> Kennedy(D). Recession of 1960-61.
Johnson(D) ==> Nixon (R). Recession of 1969-1970.
Ford(R) ==> Carter(D). Recession of 1973-1975. (It's not really fair to blame Carter for this).
Carter(D) ==> Reagan (R). Recessions of 1980 and 1981-1982.
Bush(R) ==> Clinton(D). Recession of 1990-1991. (It's not really fair to blame Clinton for this).
Clinton (D) ==> Bush (R). Recession of 2001.
Bush (R) ==> Obama (D). Recession of 2007-2009.
Obama (D) ==> Trump(R). Recession of 2017-2018?
Since 1960, every single recession has occurred within a year of an election in which the parties switch power. An no recession has occurred at any other time. The list actually goes back all the way to 1910, I just haven't analyzed it further back. (What about the recession of 1957-58?)
There will be a recession next year, guaranteed.