A second poll released Friday night shows Bernie Sanders and Hillary Clinton in a national statistical tie, creating a phenomenal trend.

The new Reuters/Ipsos national poll released Friday night backs up an earlier Quinnipiac poll, showing Bernie Sanders and Hillary Clinton in a dead heat nationally, following the nail-biting Iowa caucus.

It shows Hillary Clinton leading Bernie Sanders 48 to 45 per cent among Democratic voters, within the 5 per cent margin of error, putting them in a statistical tie.

The poll of 512 Americans, conducted in the days following the Iowa caucus demonstrates that the Democratic race tightening.

Previously, Democrats had been supporting Clinton by more than 2-to-1 margin. Sanders has narrowed that gap considerably over the past several weeks.

A Quinnipiac University poll released earlier today showed similar results. This new Reuters/Ipsos poll backs up those numbers.