Richard Nixon R 1969-1974 (1 full term +10 months 2nd term) Dow 931.25 to 784.89= (-15.7%), S&P 101.69 to 81.57= (-19.8%)
Gerald R. Ford R 1974-1977 (3 years 2 months completing Nixon's 2nd term) Dow 784.89 to 968.67= +23.4%, S&P 81.57 to 103.85 = +27.3%
Jimmy Carter D 1977-1981 (1 term) Dow 968.67 to 970.99 +0.23%, S&P 103.85 to 134.37 = +29.4%
Ronald Reagan R 1981-1989 (2 terms) Dow 970.99 to 2239.11= +130.6% (for all years) , S&P 134.37 to 286.91 = +113.5%
George H. W. Bush R 1989-1993 (1 term) Dow 2239.11 to 3255.99= +45.4%, S&P 286.91 to 435.13 = +51.6%
Bill Clinton D 1993-2001 (2 terms) Dow 3255.99 to 10,587.59= +225.17%, S&P 435.13 to 1342.54= +208.5%
George W. Bush R 2001-2009 (2 terms) Dow 10,587.59 to 8,281.22= (-21.8%) , S&P 1342.54 to 850.12 (-36.6%)
Barack Obama D 2009-2017 (2 terms) Dow 8281.22 to 19,732.40= +138.27% , S&P 850.12 to 2263.69 +166.2%
Donald Trump R 2017- present (as of October 23, 2020 market close) Dow 19.732.40 to 28,335.57= +43.9%, S&P 2263.69 to 3465.39 +53