"Circuit splits provide great writing opportunities because their existence suggests that lawyers and judges were not able to come up with a viable, widely accepted solution to the problem on their own."
Nicholas J. Wagoner, 3 Reasons Why Circuit Splits Matter: Legal Scholarship, Circuit Splits (December 17, 2011).
Try the following search in cases on Lexis or Westlaw:
Simple search query in a case law database:
(circuit* /s split*) AND yourtopic
court or circuit /s split & da(aft 1/2025)
Advance search query in a case law database:
(conflict! or split! or division or divide! or "different conclusions") /10 (authority or preceden! or "lower court" or circuit or "state supreme court") and yourtopic
If you are looking for circuit splits that might be decided by the U.S. Supreme Court, then search in a database of Federal Circuit Court cases. HOWEVER, you might want to include federal district court cases too in case they mention a split.