House Speaker Kevin McCarthy announced Tuesday he is calling on his committees to open a formal impeachment inquiry into US President Joe Biden, even as they have yet to prove allegations he directly profited off his son’s foreign business deals, Ednews reports citing Politico.

The move comes amid increasing pressure from his right flank to move ahead with the inquiry, including some on his far right who have threatened to oust McCarthy from his speakership if he does not move swiftly enough on an impeachment inquiry. McCarthy is also trying to secure votes as part of negotiations to keep the government funded beyond the September 30 deadline to avert a shutdown.

“These are allegations of abuse of power, obstruction and corruption,” the California Republican said in remarks outside his office on Capitol Hill. “They warrant further investigation by the House of Representatives. That’s why today I am directing our House committee to open a formal impeachment inquiry into President Joe Biden.”

The House-led GOP investigations have yet to provide any direct evidence that the president financially benefited from Hunter Biden’s foreign business dealings.

McCarthy said he is tapping House chairmen Reps. James Comer of Kentucky, Jason Smith of Missouri and Jim Jordan of Ohio to lead the inquiry.

In recent weeks, McCarthy has privately told Republicans he plans to pursue an impeachment inquiry into Biden and hopes to start the process by the end of September, according to multiple GOP sources familiar with the conversations. While McCarthy has already publicly threatened to launch an inquiry, sources say that McCarthy has sent even stronger signals about his intentions behind closed doors.