The drop of seven percentage points is seen as an effect of the decision of the FBI last week to re-open its investigation against her alleged email scandal, following which the popularity of Trump has surged.
Northern states are the focus, with both candidates due to appear in MI and Pennsylvania.
Clinton campaign said it's spending a lot of time in MI at the finish line because that's when the votes are cast. "But there's a tremendous amount of work to do".
Virginia is considered a battleground state, but in recent election cycles has voted Democrat and was expected until recently to go for Clinton.
In the final stretch of the campaign, a scuffle broke out at a Trump rally in Reno, Nevada, on Saturday night and the Republican candidate was rushed off stage by the Secret Service when someone in the crowd shouted "gun".
A man holding a sign saying Republicans Against Trump was tackled by security agents. No gun was found.
This means she is off the hook and can finally put the controversy to rest. "We think we have this race over", Clinton campaign chairman John Podesta said Sunday on ABC's "This Week".
Michigan And Penn State Rightly Reject Friday Night Games
Michigan State has opened its season on a Friday for six straight years, including this season, against Furman . The news came after the Big Ten for years said it was against going head-to-head with high school games.
Ms Clinton still holds a six per cent lead in Pennsylvania - with its 20 electoral college votes - according to a poll for regional newspaper Morning Call, but OH - with 18 electoral college votes - is leaning 2.7 per cent in Mr Trump's favour according to RealClearPolitics.
The Clinton quickly commended Comey's call.
Clinton campaign chairman John Podesta told NBC's "Meet the Press" that the campaign believes if Clinton wins Nevada and MI, she "is going to be the next president of the United States".
Critical in both states is African-American turnout.
Since then, national polls and battleground states have tightened, though Clinton still appears to hold an edge over Trump in the campaign's last moments. The U.S. dollar dipped to a more than one-month low against the safe-haven Swiss franc on Friday, while weakness in oil prices raised concerns about low inflation and pushed U.S. Treasury prices higher.
Most polls have Hillary Clinton in front, but they still remain perilously close.
In his first stop in Iowa, he said that if Mrs Clinton were elected there would be an "unprecedented constitutional crisis" over the allegations she faces over her handling of sensitive material during her time as secretary of state.
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