From the NY Times in 2021:
"The New York Times reported in February 2021 that: "Since 1933, the economy has grown at an annual average rate of 4.6 percent under Democratic presidents and 2.4 percent under Republicans...The average income of Americans would be more than double its current level if the economy had somehow grown at the Democratic rate for all of the past nine decades."
On unemployment:
Blinder and Watson found that the unemployment rate fell under Democratic presidents by an average of 0.8 percentage points, while it increased under Republican presidents by an average of 1.1 percentage points. Journalist Andrew Soergel wrote in U.S. News & World Report in October 2015 that: "The country's unemployment rate has been lower at the end of every Democrat's tenure since Kennedy took office in 1961. Ronald Reagan, meanwhile, is the only GOP president since Dwight Eisenhower took office in 1953 who can say the same."The unemployment rate under Carter was 7.5% at the start and end of his tenure, but measured precisely fell slightly from 7.49% to 7.47%, consistent with Soergel's article
On stock market returns:
Stock market returns are also higher under Democratic presidents. CNN reported in September 2020 that: “Since 1945, the S&P 500 has averaged an annual gain of 11.2% during years when Democrats controlled the White House, according to CFRA Research. That's well ahead of the 6.9% average gain under Republicans.”
This one isn't even close - under Democrats, stock market on the S&P are at 8.35%, while the GOP is at 2.70%.
On federal budget deficits:
Blinder and Watson reported that budget deficits tended to be smaller under Democrats, at 2.1% potential GDP versus 2.8% potential GDP for Republicans, a difference of about 0.7 of a percentage point. They wrote that higher budget deficits should theoretically have boosted the economy more for Republicans, and therefore cannot explain the greater GDP growth under Democrats.
Since 1981, federal budget deficits have increased under Republican presidents Reagan, both Bushes and Trump, while deficits have declined under Democratic presidents Clinton and Obama. The economy ran surpluses during Clinton's last four fiscal years, the first surpluses since 1969. The deficit was projected to decline sharply in Joe Biden's first fiscal year.
On recessions:
CNN reported in October 2020 that 10 of the last 11 recessions started under Republican presidents, and that “Every Republican president since Benjamin Harrison, who served from 1889 to 1893, had a recession start in their first term in office."
