Hillary Clinton's collapse at the 9/11 memorial event may have cost her points in the polls, as Donald Trump makes gains with voters nationwide.

In the most recent head to head poll from LA Times/USC Tracking, Trump is six points ahead of Clinton on 47 to her 41, while a Fox News poll puts the GOP nominee one point ahead on 46 to Clinton's 45.

However, a CBS News/NY Times poll shown on Real Clear Politics puts Clinton two points ahead of Trump in a head to head race, while the same poll in a four way race including Gary Johnson and Jill Stein sees the Republican and Democrat candidates tied, and Clinton one point up in a four-way race from Fox News.

"No question there's a movement toward Trump right now," Monmouth University pollster Patrick Murray told The Hill.

"When the media is focused on one candidate over the other, it's generally negative. The media has been focused on Clinton and her health, and Trump smartly did not try to steal the limelight from her."

It was a less than positive week for the Democrat nominee, who ahead of her collapse on 11 September and subsequent diagnosis with pneumonia made a comment that half of Trump supporters were "a basket of deplorables".

She has since apologised for the comment, but not before Trump seized on it and stated he "respected all" of her supporters.

However, despite Trump gaining ground on Clinton – who just one month ago had taken a double-digit lead on the GOP nominee – an election forecast from FiveThirtyEight predicts a win for Clinton.

The forecast gives Clinton winning odds of 60.3%, with Trump at just a 39.7% chance of winning, using recent data and counting the likely popular and Electoral College votes and simulating the election 20,000 times to get a variety of outcomes for each state.