Carolyn Maloney of New York to replace Cummings in an acting capacity based on Maloney’s seniority. House Speaker Nancy Pelosi appointed U.S. Jackie Speier announced last week she was also in the running. Stephen Lynch of South Boston has announced he’s running to fill the spot. The chairman was Elijah Cummings, who died two weeks ago. House of Representatives and will play a major role in the impeachment investigation into President Trump. The chair of the committee is always selected from the majority party and the ranking member is the most senior member of the minority party. The Committee on Oversight and Reform is the main investigative committee of the U.S. Some of the committee’s other investigations include the 2020 Census citizenship question - opposed by Democrats - and family separation at the southern border. but as we wait for the Senate to act, we must pursue other crucial reforms. “The Committee oversees government operations, health care, information technology, interior, energy and environment, national security, and intergovernmental affairs.” The House Oversight Committee is the main investigative committee in the. The committee oversees the federal government and all of its agencies to “ensure efficiency, effectiveness, and accountability,” the committee’s website states. Its chairman is one of only three in the House with the authority to issue subpoenas without. The committee's broad jurisdiction and legislative authority make it one of the most influential and powerful panels in the House. House of Representatives and will play a major role in the impeachment investigation into President Trump. The Committee on Oversight and Reform is the main investigative committee of the United States House of Representatives. The Committee on Oversight and Reform is the main investigative committee of the U.S.