Labor unions and liberal groups are pressing President Obama to select left-wing nominees for key regulatory and judicial posts in the aftermath of the Senate nuclear option. Groups have been meeting with White House officials throughout the year to influence the president’s selection of nominees and plan to ramp up their efforts in the weeks ahead. “Before we weren’t trying to push people with a labor backgrounds because we knew they would never have been confirmable,” said a senior labor official. “That bar has been removed. You’ll see considerable interest in seeing more progressive people appointed to positions.” Groups are...