Donald Trump and Ben Carson are running neck-and-neck in a recent Fox News 2016 Republican presidential poll, more than doubling the level of support of any of the party's other crowded list of candidates.

Donald Trump Leads, Carson Close Behind

According to a national Fox poll, Trump now garners 24 percent of the vote, just a point ahead of the surging Carson, who has nearly doubled his level of support since mid-August. Texas Sen. Ted Cruz is the only other candidate to draw at least double-digit support at 10 percent. Marco Rubio stands at 9 percent and Jen Bush clocks in at 8 percent.

Fueling Carson's meteoric rise seems the belief among voters that he is the most trustworthy among all the GOP candidates. Some 68 percent of respondents tabbed him as the most "ethical" among all the party's candidates. His closest challenger in that department is Rubio, at just 46 percent.

Carly Fiorina's Numbers Take a Dive: Why?

While Trump's support has remained steady since the last time the poll was conducted, former Hewlett-Packard CEO Carly Fiorina has seen support for her dramatically rise and more recently tumble again as 2016 campaign season kicks into even higher gear.

After a September rise fueled by widespread chatter that she had emerged victorious in the party's first debate, Fiorina has seen her support cut in half since last month and again finds herself hovering far behind the leaders at just five percent of te vote.

Part of the drag on her numbers appears to stem from her fight to defund Planned Parenthood and her insistence that the organization keeps fully formed fetuses alive to harvest their brain.

According to CNN, even after fact-checkers found that the video she claimed supported her stance does not exist, she doubled down on her position and continued to purport her argument as fact.

"I've seen the footage," she argued. "And I find it amazing, actually, that all these supposed fact-checkers in the mainstream media claim this doesn't exist. They're trying to attack the authenticity of the videotape. I will continue to dare anyone who wants to continue to fund Planned Parenthood, watch the videotapes."

Also dogging her run for the Oval Office are ongoing attacks on her tenure at Hewlett-Packard, which many of her critics characterize as a time of rampant abuse on workers with her as the "face of corporate greed."

Conducted over land-line and cell phone interviews with 1,000 randomly selected registered voters from Oct. 10-12, the poll has a margin of sampling error of plus-or-minus 3 percentage points.