The victories in Texas, Ohio, Vermont and Rhode Island would give the 71-year-old Arizona senator more than the 1,191 delegates to the party's national convention required to seal the nomination, CNN, Fox and MSNBC said.
Former Arkansas governor Mike Huckabee on Tuesday quit the White House race, saying he had congratulated his rival McCain on winning the Republican Party's nomination.
Huckabee, who had fought a surprisingly strong campaign for a rank outsider, threw his weight behind McCain saying it was time for the party to unite behind a candidate.
Huckabee, an ordained Baptist preacher who had appealed to the country's Bible belt, said it was apparent that McCain would "achieve the 1,191 delegates to become the Republican nominee for our party.
"I extended to him not only my congratulations, but my commitment to him and to the party to do everything possible to unite our party, but more importantly to unite our country so that we can be the best nation we can be, not for ourselves, but for the future generations," he said.
Last Mod: 05 Mart 2008, 15:11