Both Clinton, 68, and Trump, 70, have support of 41 per cent of the likely voters in a four-way race with Gary Johnson of the Libertarian Party and Jill Stein of the Green Party, said the poll conducted by Investor's Business Daily/ TechnoMetrica Market Intelligence Tracking Poll.
In 2012, pollster Nate Silver has called it as the most accurate poll.
The poll was conducted between October 18 and 23 in which 815 likely voters were interviewed.
In a two-way race Clinton and Trump both get support of 42 per cent of the likely voters.
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Other major polls have given Clinton a lead of between six to 12 percentage points against Trump.
In RealClearPolitics, which keeps track of all major polls, Clinton is leading Trump by over six points.
The elections are scheduled to be held on November 8.
Pollsters and political pundits are giving a clear edge to Clinton in the elections observing that rarely in history a trailing candidate has overcome a gap of six points.
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