U.S. Sen. John McCain, R-Ariz., easily won the Republican nomination for president Tuesday, winning primaries in four states.

With wins in Texas, Rhode Island, Vermont and Ohio, McCain surpassed the 1,191 delegates needed to win.

However, according to early exit polls, McCain still lacks appeal among some Republican voters. Former Arkansas Gov. Mike Huckabee received more support than McCain among evangelical Christians in Texas, although McCain won the state overall.

Huckabee withdrew from the race late Tuesday evening.