"Strong enthusiasm for Clinton has lost 7 points since the start of tracking, especially Friday through Sunday".
Clinton campaign manager Robby Mook questioned why the FBI director had not released any information about its investigation into Russia's role in the United States election or ties to Trump and his senior aides.
More likely Democratic voters support Clinton (81 percent), than likely Republican voters support Trump (74 percent), according to the poll.
Fox News host Sean Hannity, a devout Trump supporter, and former Rep. Jack Kingston of Georgia, a senior Trump adviser, said the election of Clinton could lead to a "constitutional crisis".
Among 1,772 people who have either voted already or were identified as likely voters in the November 8 election, 45 percent said they supported Clinton, while 39 percent said they backed Trump.
Even with national polls narrowing, the Democratic contender has many more paths to 270 electoral votes.
Among the 710 likely voters called last week, the Elon Poll finds clear divides between self-identified Democrats and Republicans on the issues of sexual assault allegations, voter fraud and media treatment of Trump and Clinton.
During the Republican primaries, Trump constantly bragged about his latest poll numbers.
Hillary Clinton celebrates the Cubs win after her campaign rally at Arizona State University
The poll tracks Trump at 46 percent with Hillary right behind him at 45 percent. And he said Trump would abuse his presidential powers if he is elected president on Tuesday, reiterating what he told voters in North Carolina - that "the republic is at risk" if Trump wins Tuesday.
"She is unfit and unqualified to be President, and her election would mire our government and our country in a constitutional crisis we can not afford".
Democrats were unified in fighting back against the GOP attacks - led by Clinton herself, who said Monday "there is no case here" by the Federal Bureau of Investigation. "She deleted 33,000 e-mails AFTER getting a subpoena from U.S. Congress. RIGGED!" He won't say what he's doing with Donald Trump.
Clinton, who is also campaigning in Florida later Tuesday, will also be introduced by former Miss Universe Alicia Machado at her event in Dade City, Florida, one of three events she's doing in the Sunshine State, a key battleground.
A new poll from Franklin & Marshall College shows Democrat Hillary Clinton with a double-digit advantage in Pennsylvania with a week to go in the presidential race.
In the last two weeks, Trump has pumped in Dollars 3 million in local advertisements.
Hillary and Bill Clinton and Barack Obama are coming not in search of winter warmth and golf.