Donald Trump has overtaken Hillary Clinton to take a single percentage point lead in a polls, the first time he has done so since May.
Though the result remains within a margin of error, the broadcaster said the leaders changing places was a noteworthy moment with just a week to go until election day.
The two candidates are virtually neck-and-neck for the past week, with aggregated results.
It makes the election too close to call, based on the poll alone. Among the other runners, Gary Johnson dropped to a new low of 3 per cent and Green candidate Jill Stein polled at 2 per cent.
The polls which surveyed across the country, has not had Mr Trump in the lead since he was 2 per cent ahead in a hypothetical run-off against Ms Clinton back on 23 May this year.
In Wisconsin, a state that for months has been seen as safe Democratic turf, a new Marquette Law School poll released Wednesday found a shift in independent voters’ views. Many moved toward Trump after the FBI said Friday it was again probing Clinton’s use of a private email system for government business.
In Florida, a new CNN/ORC survey of Florida voters had Clinton up 1 and Quinnipiac also had her up 1. Trump was leading among independent voters, 46-40, Quinnipiac found.
In Pennsylvania, New Alliance has Trump at 44, and Clinton trailing close behind at 43.
In North Carolina, Trump was up 45-38 among independents, Quinnpiac said.
In Wisconsin, among independent voters, Clinton was up by 7 over Trump on Wednesday and Thursday. Friday, Trump jumped to a 10 point advantage, then back to 8 in Saturday through Monday interviews.
Most polls also showed a spike in support for Mr Trump in late polling. The momentum is now behind Donald Trump, the Democrats are powerless to stop it.
It should also be noted that even this close to an election, a poll on voter preferences is not necessarily indicative of the final result.
ABC noted that Mitt Romney was one point ahead of Barack Obama in a comparable tracking poll in 2012, while John Kerry held an identical advantage over George Bush a week out in 2004.