Donald Trump has strongly denied accusations of sexual assault - describing it as a concerted attack on him by the media - after Michelle Obama used a New Hampshire rally to launch an unprecedented attack him.
Rocked by sexual assault allegations, Donald Trump says his campaign is "an existential threat" to the political establishment.
Trump made his comments at a rally Thursday in West Palm Beach, Florida. It was his first appearance since several women stepped forward to say they had been groped and received unwanted advances from Trump.
The Republican nominee said "the political establishment'" is trying to stop him and said that "for the media, nothing is out of bounds".

He has evidence to disprove the allegations and will release it at the "appropriate time", he said.Denying the allegations of sexual assault, he called them "coordinated, vicious attack" from the media and Hillary Clinton campaign.
Several women have come forward in a series of reports claiming that Trump groped or kissed them without their consent and made unwanted advances.
Trump said the claims "are totally and absolutely false". He called them "pure fiction and outright lies".
Trump met business leaders before the rally, as roundtable guests booed at his refusal to answer a reporter's question as to whether he has ever touched or kissed a woman without her consent.
Roundtable guests booed as he dodged the question.
Trump then turned to the room and declared "what a sleazebag".
Michelle Obama earlier said she "was shaken to the core" by Trump's comments on a 2005 tape in which he brags about how his fame allowed him to "do anything" to women.
Speaking at campaign rally for Clinton, Obama called the comments "shocking and demeaning". She also dismissed the suggestion that they were simply "locker room talk", saying they were affront to all women and parents.
Obama said Trump's crude sexual comments about women should not be seen as "politics as usual".
She said they should outrage everyone, regardless of political affiliation. She said he was bragging about sexually assaulting women.
But Trump said on Twitter that a New York Times story on two women who allege he groped them years ago is "phony" and a "total fabrication".
He is also going after a People magazine writer who alleged he pinned her against a wall and kissed her without consent in 2005 as she was interviewing him for a wedding anniversary story.
He tweeted: "Why didn't the writer of the twelve year old article in People Magazine mention the "incident" in her story. Because it did not happen!"
The writer says she didn't publicise the incident at the time because she was ashamed, afraid of the repercussions and blamed herself for what she says happened.
And the soap opera actress in the video that has rocked the presidential campaign says Trump's comments were offensive.
But actress Arianne Zucker said she wasn't shocked by it, given "that type of personality". She says that's "probably why it doesn't mean a lot to me".
Zucker spoke in an interview broadcast Thursday on NBC's Today.
Zucker is the actress who meets Trump and TV personality Billy Bush on a soap opera set in the 2005 video. In the video, Trump boasts of using his fame to kiss and grab women. Trump, before greeting Zucker, tells Bush he needs to use Tic Tacs in case he starts kissing her.
Trump has said he regrets the remarks, which he describes as "locker room" banter. Zucker described that as "an interesting apology."
Trump's campaign is now openly signalling it will spend the election's final month re-litigating Bill Clinton's marital affairs and unproven charges of sexual assault, as well as his Hillary Clinton's unverified role in intimidating the women who were involved.
But the video is hitting Trump's support, including in New Hampshire, and there is unprecedented uncertainty about how conservative Utah will vote in the November election because the usual cohesion of voters in the Republican stronghold has been blown up by Trump's crudeness and volatility.
Utah is a must-win state for Trump, and he may squeak out a victory. But the state's widespread aversion to the brash billionaire has soared following the release of a recording of Trump degrading women.
An increasing number of Utah's mostly Mormon voters are considering going with third-party candidates Evan McMullin and Gary Johnson.
It could mean an improbable Utah victory for Democrat Hillary Clinton if she captures just one-third of the state's votes. That's a level achieved several times in past three decades by Democratic candidates.
The questions about Donald Trump are starting to get old for Senator Roy Blunt of Missouri.
The Republican is in a tight re-election campaign with Missouri Secretary of State Jason Kander. Blunt supports Trump, but has distanced himself from the Republican presidential candidate.
Asked after a campaign appearance in suburban St. Louis on Thursday about new allegations by women accusing Trump of inappropriate behavior, Blunt said the issue "is not what we ought to be talking about".
Asked if he is reconsidering his support, Blunt said the question has been "asked and answered like 10 times in the last week, and the answer's still the same".
Blunt said he wants a president who can change the Affordable Care Act, reduce regulation, and improve foreign policy.
Tim Kaine says Hillary Clinton's marriage is "not an issue for the voters," despite Donald Trump's efforts to highlight Bill Clinton's misconduct.
The Democratic vice presidential nominee Tim Kaine told ABC's The View that the latest allegations from several women who said Trump touched or kissed them without permission are "shocking."
He also played down the latest batch of hacked emails of Clinton campaign staffers.
He says you "can't automatically assume" the hacked emails are real.
It's impossible to authenticate each hacked email published by Wikileaks, but Democrats have not pointed to specific cases in which emails were altered.