Donald Trump is still the Republican Presidential front-runner, according to a new national survey.

FOX's Rachel Sutherland reports from Washington:

A new Quinnipiac national poll shows Trump with 39% among likely Republican voters.

Marco Rubio is gaining steam, now in second place with 19% support and telling FOX News:

(Rubio) "Our numbers continue to grow and we feel good about what that's going to mean on Saturday night."

Jeb Bush, who has 4% support in the national poll, is staying positive:

(Bush) "We're making great progress, steady progress."

The Quinnipiac poll shows a majority of Republican voters think Trump has a good chance of winning in November.

Rachel Sutherland, FOX News.

CLICK HERE for the rest of the results of the latest Quinnipiac poll