A voter survey shows Democratic presidential nominee Hillary Clinton and her Republican rival, Donald Trump, in a technical tie in the key battleground state of Florida.

According to the NBC News/Wall Street Journal/Marist survey, Ms Clinton is leading Mr Trump by 45 per cent to 44 per cent, while Libertarian Party candidate Gary Johnson and the Green Party’s Jill Stein garnered 5 per cent and 2 per cent, respectively.

Ms Clinton’s advantage in the poll, however, is within the error margin of 3.1 per cent for the 990 registered voters surveyed, and within the 3.5 per cent error margin for the 779 people who said they are only “possible voters.”

The survey was conducted on October 25-26 and it does not take into account the potential impact of the recent announcement that the FBI is examining “new” emails that may have a bearing on its investigation into Ms Clinton’s e-mail scandal.

Watergate reporter Carl Bernstein dismisses Trump hyperbole

No way HRC emails 'bigger than watergate' -or close. Watergate was about a criminal Potus & 48 aides/co-conspirators found guilty.

— Carl Bernstein (@carlbernstein) October 29, 2016

Ms Clinton’s support has not changed when compared with the previous NBC/WSJ/Marist poll surveying Florida voters in early October.

Those who said they intend to vote for Mr Trump, however, rose from 42 per cent to 44 per cent.

If the two minority candidates are excluded, the survey gives both Clinton and Trump 46 per cent.

Winning Florida, with its 29 electoral votes, would be a key victory for either Clinton or Trump and could decide the election.