The House voted on Wednesday to formally open an impeachment inquiry into President Biden, pushing forward with a yearlong G.O.P. investigation that has failed to produce evidence of anything approaching high crimes or misdemeanors.
Republicans said the vote was needed to give them full authority to continue carrying out their investigation amid anticipated legal challenges from the White House. Democrats have denounced the inquiry as a fishing expedition and a political stunt.
G.O.P. leaders refrained for months from calling a vote to open an impeachment inquiry, given the reservations of…