Two of the three polls, carried out after the FBI announced its decision on October 28 to reopen its probe into her alleged email scandal, showed Clinton leading Trump by three percentage points, while in another (IBD/TIPP), she is leading the real-estate mogul by just one percentage points.
As per IBD/TIPP, considered to be the most accurate poll, Clinton has support of 45 per cent of the likely voters as against Trump's 44 per cent.
As per RealClearPolitics, which keeps track of all major national polls, the difference between the two leaders has come down to within the margin of error.
About a fortnight ago, Clinton's lead was more than eight per cent, which has now come down to 2.5 per cent in the average of polls.
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In the Bing's average of national polls, Clinton's lead over Trump is slightly better at four per cent.
Reports of tightening of the race to the White House is also coming from state level polls.
Releasing the findings of its key battleground states, Axiom Strategies and Remington Research Group said Trump has broken a tie in Florida and has opened up a four-point lead over Clinton.
He has also closed the gap in Pennsylvania and Colorado and has expanded his leads in Nevada and Ohio.
North Carolina remains close with Trump's three-point lead a week ago now down to a two-point lead, it said.
"This week, we find an increasingly competitive race with just eight days to go. Trump appears to be holding strong in his must-win states and Colorado remains within the margin of error.
"The data also show that Pennsylvania has moved into the margin of error category," it said.
"The presidential race remains very competitive as we move into the final stretch. Hillary maintains an advantage leading in Colorado and Pennsylvania, but at this point anything can happen," said Titus Bond, director of Remington Research Group.
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