Despite his slow start in nominating judges and Republican delays in Senate confirmations, Obama has still managed to alter the balance of power on four of the nation’s 13 circuit courts of appeals. Given a second term, Obama could have the chance to install Democratic majorities on several others.

Fourteen of the 25 appeals court judges nominated by Obama replaced Republican appointees…

There are still more Republicans than Democrats on the circuit appeals courts and on the entire federal bench. But if Obama merely filled existing vacancies, Democratic appointees would be the majority on the influential court of appeals in Washington, where four current Supreme Court justices once served, and the Atlanta-based 11th U.S. Circuit Court of Appeals. Republicans also maintain their edge on the 10th Circuit in Denver only because two judgeships are empty…

Obama’s picks have yet to surprise anyone with their decisions, said Levey, head of the conservative interest group. “So Obama’s liberal critics can rest assured that if he’s re-elected, his transformation of the appeals courts will make a big difference in the law.”