Perry assumed the office of governor on December 21, 2000, following the resignation of George W. Bush—who was preparing to become President of the United States. He won the office in his own right in the 2002 gubernatorial election, where he received 58% of votes to Laredo oilman and businessman Tony Sanchez's 40%. He was re-elected in the 2006 gubernatorial election against three major opponents, polling 39% of votes against runner-up former U.S. Congressman Chris Bell of Houston with 30%. In the 2010 gubernatorial election, Perry became the first Texas governor to be elected to three four-year terms, polling 55% of votes to former Houston Mayor Bill White's 42%.