With less than 50 days remaining until the 2016 presidential election, national polls aren't the only sign the race is tightening between Hillary Clinton and Donald Trump. The possibility of a Trump victory, although still small, has risen among U.S.-based business leaders, while expectations that Clinton will assume the presidency have fallen. In July, 90 percent of U.S. respondents to the CNBC Global CFO Council Survey predicted a Clinton win, but the latest survey, which included responses from 25 U.S.-based CFOs, saw confidence in the Clinton campaign decline by approximately 10 percent. Trump's chances of a win doubled, reaching 20 percent. The number of individual chief financial officers who think Trump will win the presidency rose to five — a high for Trump. In the previous survey, only 2 CFOs said they expected Trump to win.

The CNBC Global CFO Council represents some of the largest public and private companies in the world, collectively managing more than $4 trillion in market capitalization across a wide variety of sectors. The quarterly CFO Council poll was conducted from Sept. 9–Sept. 16.

A separate CNBC Fed Survey, also released Tuesday, showed a big decline among respondents expecting Clinton to win the election, down month over month from 84 percent to 51 percent.

CFOs around the globe also weighed in on some other big global financial concerns, including the timing of the Fed's next interest-rate move and Brexit.



Don't expect Fed to rush ahead

Brexit fallout

CNBC also surveyed the Global CFO Council on imminent repercussions from the decision by the U.K. to leave the European Union. Five out of 46 council member CFOs said the Brexit decision will directly lead to a head count reduction in their company in the U.K. and/or the EU by the end of the year.

A big read on robots in the workplace

Robots, artificial intelligence and advanced automation are expected to take a significant toll on the human workforce in the years ahead, but expert predictions have been all over the place. CNBC Global CFO Council members were able to offer some big numbers from the current C-suite perspective. By 2020 the majority of respondents expect that up to a quarter of their firm's current workforce will be replaced by machines, robots or some combination of hardware and software.

Complete survey results below:

(Note: Forty-six of the 107 current members of the CNBC Global CFO Council responded to this quarter's survey, including 25 U.S.-based members. Members represent a diverse mix of public and private companies from around the world, with more than $4 trillion in market capitalization.)