evidence: Speaker of the House Kevin McCarthy walks back into his office after announcing an impeachment inquiry against U.S. President Joe Biden to members of the news media at the U.S. Capitol on September 12, 2023 in Washington, DC. House Speaker Kevin McCarthy announced September 12 he is calling on his committees to open a formal impeachment inquiry into President Joe Biden, even as they have yet to prove allegations he directly profited off his son’s foreign business deals. [...] But Biden’s advisers believe the inquiry announced by McCarthy could be used to their advantage if Republicans are viewed as overstepping in their claims or shirking their governing responsibilities, according to officials who laid out their plans.