The committee has been investigating allegations that Mr. Gaetz, President-elect Donald J. Trump’s pick for attorney general, engaged in sexual misconduct and illicit drug use.
The success of the G.O.P. push to keep the majority suggests that it paid no political price for the chaos and paralysis of its past two years in control of the House.
The State Department said Israel needs to take more steps to improve the situation among Palestinians. The United States had given the country 30 days to meet aid criteria.
The group’s leaders, Govs. JB Pritzker of Illinois and Jared Polis of Colorado, are ambitious Democrats likely to try to fill the party’s looming leadership void.