"It is time for our society to address some honest and very hard truths", Trump said at an election rally in Wisconsin.
The poll also breaks down by gender why Millennials feel Hillary Clinton is a better or a worst candidate than Donald Trump, but goes further into "feeling out" what the future holds for both parties based on the number of Millennials who are mostly siding with the Democratic Party.
He ticked off statistics on crime, poverty and education that have plagued Milwaukee, which he said was a city run by Democrats "decade after decade". "We have to obey the laws or we don't have a country", said Mr Trump.
"They don't want to support him, and are not sure whether they are going to come out and vote or not", Greenberg said.
Trump has marketed himself as the law-and-order presidential candidate and accused Democratic rival Hillary Clinton for being indirectly responsible for the riots.
Trump has previously called for an unprecedented temporary ban on Muslims entering the USA, and he said in a speech Monday that he would overhaul the nation's screening process and block those who sympathize with extremist groups or fail to embrace American values.
"There is no new Donald Trump".
Three quarters of Democrats said Clinton is a boost while Republicans were split on the issue.
"America wants a change and Hillary Clinton is not a change agent", Walker said.
This week, the rhetoric Donald Trump is usually known for is on the back burner as reports circulate of the Republican National Committee (RNC) considering pulling funds away from their "toxic" nominee to focus on the House and Senate.
In a head-to-head matchup in Colorado, Clinton led 49 percent to 39 percent.
Trump was traveling on Tuesday to Milwaukee, the site of ongoing protests over the fatal shooting of a black man by a black police officer.
"How can Trump put this forward with a straight face when he opposes marriage equality and selected as his running mate the man who signed an anti-LGBT law in IN?" he said in a statement.
The police have not yet discussed details of the case and it is not clear whether Smith pointed a gun at officers and fired or attempted to fire shots or not. "You know it and I know it, and guess what - she knows it". I think that, who can have a problem with that? "Maybe it's not true".
Among those present were Milwaukee County Sheriff David Clarke, who penned an article on Monday blaming liberal Democrats and the media for the unrest that has rocked the city.
Trump also posed for photographs with a handful of veterans, including one wearing a "Hillary for Prison" T-shirt.
"He understands the importance of public safety".
Trump called blacks the "main victims" of the riots in Milwaukee.
The former New York City mayor, a top Trump supporter, disputes the suggestion it reflects negatively on campaign chairman Paul Manafort.
Republican presidential candidate Donald Trump speaks in Youngstown, Ohio, on August 15, 2016. Promising to be the greatest champion, Trump posted on Facebook, This is my pledge to the American people: as your President I will be your greatest champion.
"I will fight to ensure that every American is treated equally, protected equally and honored equally", he said.
Clinton and Trump have each sought the upper hand as the chief executive most capable of battling terrorism. This is certainly the feeling of many Americans in general, as the convention was largely seen as four days of what many feels was an event full of fear-mongering and negativity. But they waited patiently in the air-conditioned building.
Not all in attendance were Trump supporters. The Democratic Party rigged the nomination to give it to Hillary Clinton, thus giving the soul of their party this year to the special interests, he said.