President Obama does not intend to “just sit idly by” as Republicans continue to thwart the administration’s three picks for a key federal appeals court in Washington, senior White House officials said Monday.

Republicans blocked the nomination of Robert Wilkins on Monday evening, sending the nomination into the purgatory of the Senate confirmation process—still alive, but unable to overcome a filibuster. Republicans similarly blocked two other nominees to the court—Patricia Millett and Cornelia “Nina” Pillard—in the past three weeks.