Democratic presidential nominee Joe Biden leads Republican President Donald Trump nationally among likely U.S. voters by 9 percentage points, according to a Reuters/Ipsos poll that showed Trump's "law and order" message falling short with its target audience of suburban voters.

The Sept. 11-15 opinion poll, released on Wednesday, found that 50 percent of likely voters said they were casting their ballots for Biden while 41 percent were doing the same for Trump. Another 3 percent said they would support a third-party candidate and the rest were undecided.

The poll also showed that most American voters were locked in on their choice for president. Nine out of 10 likely Biden voters and 8 out of 10 likely Trump voters said they were "completely certain” about their choice for president. Only 1 in 10 likely Biden voters and fewer than 2 in 10 likely Trump voters appeared to be wavering in their choice.