WASHINGTON — President Joe Biden is eyeing at least three judges for an expected vacancy on the Supreme Court as he prepares to quickly deliver on his campaign pledge to nominate the first Black woman to the nation’s highest court, according to aides and allies.With Justice Stephen Breyer set to announce his retirement Thursday, early discussions about a successor focused on U.S. Circuit Judge Ketanji Brown Jackson, U.S. District Judge J. Michelle Childs and California Supreme Court Justice Leondra Kruger …