NEW YORK (CBSNewYork)– Democrats Hillary Clinton and Tim Kaine have a wide lead over Donald Trump and Mike Pence, according to the latest national McClatchy-Marist poll.

The poll found Clinton has a commanding 15-point lead over Trump in the presidential contest. According to the poll, Clinton has come a long way from mid-July when a slim three points separated the two candidates.

The poll found the Clinton-Kaine ticket had 48 percent support, while the Trump-Pence ticket polled at 33 percent. Twelve percent said they would not support either candidate and 2 percent said they would back a third party.

“Add a long list of unforced errors by Trump to Clinton’s post-convention bounce, and you end up with a Trump candidacy in jeopardy,” Dr. Lee M. Miringoff, Director of The Marist College Institute for Public Opinion said in the press release. “The tale of the tape is that Trump now trails Clinton by double digits and, in contrast with Clinton, is viewed as unacceptable by the majority of the electorate.”

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The poll indicates that support among Democrats has increased for Clinton, with 90 percent now backing her, up from 83 percent in July.

On the contrary, the poll indicates that support among Republicans has done the very opposite for Trump, with 79 percent now backing him, down from 85 percent.

The poll found that Clinton’s favorable rating has improved since the last poll, but that Trump’s has changed very little.

Forty percent of Americans said they had a favorable opinion of Clinton, while 55 percent have an unfavorable impression.

Twenty-eight percent of residents think well of Trump, while 66 percent have a negative opinion.

John Heilman, co-editor of Bloomberg Politics, said on “CBS This Morning” that the polls might not be changing for a while.

“We’re about to head into three weeks of Olympics coverage,” Heilman said. “There’s not a lot of opportunity to move these numbers and reset the race until you get to mid-September.”

For complete McClatchy-Marist Poll findings and methodology, go to The Marist Poll’s website.

Meanwhile Friday, Clinton was once again explaining her emails, and blamed herself for inconsistencies during an interview about what FBI Director James Comey said, and what she told the American people.

“I was pointing out, in both of those instances, that the director Comey had said that my answers in my FBI interview were truthful,” Clinton said. “What I told the FBI, which he said was truthful, is consistent with what I have said publicly – so I may have short-circuited.”

Meanwhile, Trump was seemingly trying to get back on message, talking about his plan to “make America great again” once more, CBS2’s Dick Brennan reported.

Trump and running mate Pence were campaigning late Friday in Wisconsin, and multiple reports said Trump was ready to endorse House Speaker Paul Ryan (R-Wis.) for reelection. That came after Trump had said he was not ready to endorse Ryan, even though his running mate already has.

Trump also did something he rarely does. He admitted he was wrong about a video.

Trump tweeted, “The plane I saw on television was the hostage plane in Geneva, Switzerland, not the plane carrying $400 million in cash going to Iran!”

Trump was asked in an interview about possible female candidates for cabinet positions. Trump named his daughter, Ivanka, and would not identify any other women.