Focusing on nationwide injunctions (the best-measured category):
| President / Period | Nationwide injunctions blocking admin policies (approx.) | Cases with meaningful appellate reversal (merits or nationwide scope) |
|---|---|---|
| Trump – 1st term (2017–2021) | 64 Congress.gov+1 | ≈23 cases (17 reversed on merits + 6 reversed as nationwide injunction) Congress.gov |
| Biden – through Mar 2025 | 14 in first 3 years; ≈28 cases total in CRS dataset by 3/2025 Congress.gov+2Congress.gov+2 | ≈7 cases (3 reversed on merits + 4 reversed as nationwide) Congress.gov |
These numbers answer your question as well as the current empirical work allows, but they’re necessarily approximate and limited to nationwide injunctions, not every single judicial check on an executive order.
