President Barack Obama’s naming of three lawyers to a key appeals court last week struck a new, more aggressive tone on the judicial nominations front, a move that ultimately could determine the size of the imprint his presidency leaves on the nation’s courts.

Obama’s formal announcement of his nominees for the U.S. Court of Appeals for the D.C. Circuit symbolized a White House more dismissive of Republican opposition and a president more willing to get involved personally in the fight, according to Washington lawyers who follow federal judicial nominations.