Trump and Carson Neck and Neck in New National Poll

Donald Trump and Ben Carson are neck and neck in the Republican presidential race, and Hillary Clinton's lead in the Democratic field is continuing to dwindle, according to a new national poll released Sunday.

In the NBC/Wall Street Journal poll released today, Trump was at 21 percent, while neurosurgeon Carson was at 20 percent. That means Carson has jumped 10 points since the latest NBC/WSJ poll in July.

After Carson, former HP CEO Carly Fiorina and Florida Sen. Marco Rubio each came in at 11 percent, followed by former Florida Gov. Jeb Bush at 7 percent, down 7 points since the July NBC/WSJ poll.

On the Democratic side, Clinton's lead over Vermont Sen. Bernie Sanders has slimmed. Clinton's support was at 42 percent, while Sanders was at 35 percent, his highest number in any airworthy national poll over the course of this election cycle. Back in July, Clinton had a 34-point lead over Sanders.

Vice President Joe Biden, who is still considering joining the race, came in third at 17 percent.