Empirical data consistently show that U.S. GDP growth has been higher on average during Democratic presidential administrations compared to Republican ones since World War II.
The US has seen greater GDP growth from democrats than republicans

U.S. economic performance by presidential party - Wikipedia
Source: en.wikipedia.org
Key Evidence
The Belfer Center found a 4.23% average annual GDP growth under Democrats versus 2.36% under Republicans since WWII.
The U.S. Joint Economic Committee corroborates that the economy performs better on nearly every measure under Democratic presidents.
Additional sources such as the Economic Policy Institute and academic research further support these findings.
What the Evidence Shows
Multiple authoritative analyses and historical economic data indicate that the U.S. Economy, measured by GDP growth and job creation, performs better under Democratic presidents than Republican presidents. For example, the Belfer Center reports an average annual GDP growth rate of approximately 4. 23% under Democrats versus 2.
36% under Republicans since World War II. Similarly, the United States Joint Economic Committee and other economic research organizations confirm this trend across various economic indicators including job growth and manufacturing investment. While some studies note differences in potential GDP growth rates or budget deficit impacts, the overall consensus from credible sources is that Democratic administrations have overseen stronger economic expansion historically.
This pattern holds true across multiple presidential terms and is supported by data from federal economic databases and independent research institutions.