In Pennsylvania, Trump leads 43-to-41 percent in a poll that has a 3.2 percent margin of error. But Clinton has lost her wide lead over Trump for having "higher moral standards".
In Ohio, Clinton and Trump remained tied at 41 percent each. The margin of error is plus or minus 4.9 points. "We need to find a way to do that again today-because it's critical to everything else we want to achieve".
The editorial stated, "Mr. Trump is a danger to the republic". That compares to Clinton's June 21 lead of 42 percent to Trump's 41 percent.
Democratic presidential hopeful Hillary Clinton extended her lead over Republican rival Donald Trump to 13 percentage points in a Reuters/Ipsos opinion poll released on Tuesday, up from 10 points at the end of last week.
Hillary Clinton's standing has taken a tumble in key swing states after an investigation into her controversial email practices brought her biggest weakness with voters into the forefront.
The poll suggested Trump's presumptive nomination could be tamping down Republican voter enthusiasm. Trump would be more effective against ISIS, voters say, but Clinton would be better responding to an worldwide crisis.
But, in a statement after Sanders endorsed Clinton, Trump's Senior Policy Advisor Stephen Miller said Bernie's endorsement becomes "Exhibit A in our rigged system.' He alleged that the Democrat Party is disenfranchising its voters to benefit the select and privileged few".
Eleven percent of registered voters said they wouldn't vote for either Clinton or Trump, which is down from 17% in the June poll. The Department of Justice decided against prosecuting Clinton, but FBI Director James Comey publicly criticized her for being "extremely careless".
In a four-way race with Trump, Clinton, Libertarian Gary Johnson, and Green candidate Jill Stein, Trump is up by six points in Pennsylvania, five in Florida, and 1 percentage point in OH, according to Quinnipiac polling.
More intriguingly, that poll hinted that Democrats were gaining strength as many voters said they were inclined to cast straight party line votes for November's entire Democrats ticket, and a sizable number of Republicans were willing to vote for Democrats running for Congress.
The Vermont senator also lauded Clinton's recent commitment to a free college tuition plan for families that make under $125,000, along with her promise to expand health care access - though he admitted it fell short of his call for a single-payer system for universal health care.