WASHINGTON - APRIL 18:   Republican presidential candidate Sen. John McCain (R-AZ) listens to U.S. President George W. Bush at the National Catholic Prayer Breakfast at the Washington Hilton Hotel April 18, 2008 in Washington, DC. President Bush spoke at the annual event that Sen. John McCain (R-AZ) also attended. Getty Images logo Getty Images 23 months ago

WASHINGTON - APRIL 18: Republican presidential candidate Sen. John McCain (R-AZ) listens to U.S. President George W. Bush at the National Catholic Prayer Breakfast at the Washington Hilton Hotel April 18, 2008 in Washington, DC. President Bush spoke at the annual event that Sen. John McCain (R-AZ) also attended.