Columbia, Feb. 25 -- Donald Trump easily defeated Nikki Haley in South Carolina's Republican contest on Saturday, extending his winning streak as he marches toward a third consecutive presidential nomination and a rematch with Democratic President Joe Biden.

The former president had been widely favored to win the Southern state, despite his litany of criminal charges and Haley's status as a native of South Carolina who won two terms as governor.

The big win bolstered calls from Trump's allies that Haley, his last remaining challenger, should drop out of the race.

But Haley, who outperformed expectations based on opinion polls, defiantly insisted she would fight on at least through "Super Tuesday" on March 5, when Republicans in 15 stat...