Donald Trump and Ben Carson are tied in a new national poll, and Jeb Bush isn't anywhere close.

Trump has 24 percent of the support fro Republican and independent Republican-leaning voters, compared to Carson's 23 percent, according to a new Quinnipiac University poll released Wednesday.

Florida Sen. Marco Rubio jumped five points to third place with 14 percent, followed by Texas Sen. Ted Cruz with 13 percent (he had 6 percent in the last poll).

Former Florida Gov. Jeb Bush registered just 4 percent, making this another poll conducted after last week's third Republican debate showing that Bush is struggling to keep up. In September, he had 10 percent in the same poll.

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