sentences:  Congressional investigations were led by Rep. Henry Waxman (D-CA), who chaired the United States House Committee on Oversight and Government Reform in the House and by Sen. Carl Levin (D-MI), on the Senate side, who chaired the United States Senate Committee on Armed Services.Republicans and Democrats joined hands in criticizing the respective parties responsible for the conditions there.This prompted President George W. Bush to appoint former Senate Majority Leader and 1996 Presidential Candidate Sen. Bob Dole (R-KS) and former United States Secretary of Health and Human Services Donna Shalala to oversee the process of healthcare for wounded soldiers.