The 2008 Republican presidential primaries were the selection process by which voters of the Republican Party chose its nominee for President of the United States in the 2008 U.S. presidential election. Senator John McCain of Arizona was selected as the nominee through a series of primary elections and caucuses culminating in the 2008 Republican National Convention held from Monday, September 1, through Thursday, September 4, 2008, in St. Paul, Minnesota. President George W. Bush was ineligible to be elected to a third term due to the term limits established by the 22nd Amendment.