Bill Clinton ducked a question Tuesday about Donald Trump's allegation that his wife cheated on him.

Clinton twice ignored a reporter asking about the insult at a restaurant in Marietta, Ohio.

The dodge came after DailyMail.com asked if the very personal attacks Trump's been hurling at his wife on the trail - and threatening to bring up in the next presidential debate - are 'inappropriate.'

The former president, whose affair with a White House intern nearly led his removal from office, looked up at the cameras, shook his head, and scoffed before answering.

'Well, he's been making those attacks, from the beginning of his campaign. So I don't think that's anything new about that, and he should just - look he should run his campaign, and she'll run hers.'

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Former President Bill Clinton dropped into the Third Street Deli in Marietta, Ohio, and ordered lunch during a bus trip across the state

The former president said hello to patrons and answered several reporters' questions today at the Third Street Deli

Bill Clinton surprised patrons at a deli in Marietta, Ohio. He's engaging with voters on a two-day bus trip in the Buckeye State

Clinton said, 'My job is very limited. I'm supposed to tell people why she'd be the best choice for president, which is what I believe.

'I agree with President Obama: he said she's better qualified to be president this time than he was elected, or than I was when i was elected. And I agree with that. That's our job.'

Reporters positioned themselves to follow-up at Bill's next retail stop, Sonny Boy Restaurant in Bridgeport, Ohio, but the ex-president steered clear.

His wife's campaign said Monday that it won't be responding to Trump's suggestion that the former first lady was unfaithful to Bill.

Pollster Joel Benenson called the Trump claim a 'shameless low' and did not dispute it.

National Press Secretary Brian Fallon said Saturday that Trump was 'particularly unhinged' at the rally where he made the remarks but did not take the allegation head on.

He declined to comment to DailyMail.com Monday as he traveled with Clinton to events in Ohio, staring straight ahead and ignoring the question.

Bill Clinton twice ignored a reporter who asked him about Donald Trump's latest claims: That Hillary Clinton also had an affair

Former President Bill Clinton engaged with a prospective voter at a deli in Ohio while on a two-day bus tour of the important swing state

The allegation of infidelity came at a Saturday rally in Manheim, Pennsylvania.

Trump said: 'Hillary Clinton's only loyalty is to her financial contributors and to herself. I don't think she's even loyal to Bill if you want to know the truth. And really, folks, really. Why should she be, right? Why should she be?'

The Republican presidential nominee, who castigated Hillary as an 'enabler' of her husband's sexual conduct in a New York Times interview Friday and warned that he is 'considering talking about more in the near future,' appeared to be making reference to Clintons' marriage.

In the same speech he imitated his rivals' near-collapse outside a 9/11 memorial following her pneumonia.

'Here’s a woman, she’s supposed to fight all of these different things, and she can’t make it 15 feet to her car.' He added, Give me a break.'

Fallon fired back in a tweet, bringing up a New York Times expose on Trump's taxes published that day.

In Ohio today, Bill Clinton was asked about Donald Trump's allegation that Hillary Clinton cheated on the ex-president, of which there is zero evidence

'Trump arrived late to his event tonight & gave a particularly unhinged set of remarks. Clearly he was sweating this looming NYT report,' he said.

Benenson said Monday on MSNBC, 'I think Donald Trump shows Americans every day how low a campaign he is running.'

The senior Clinton adviser claimed Americans 'know and trust' his candidate, a former U.S. senator and secretary of state, 'has put children and families at the center of her career.'

'There seems to be no limit to the shameless lows Donald Trump can go to in this campaign,' he stated. 'And we're not gonna address any of those things he does. He mocked a disabled reporter. He mocked her the other night for being ill when she had pneumonia.'

Clinton and her campaign have made the Times' article on Trump's taxes the focus of their attacks. The newspaper said Trump reported a $916 million loss on his 1995 return that could have exempted him from paying federal income taxes for 18 years.

Trump ally and former New York City Mayor Rudy Giuliani said Sunday that Trump's tax finagling was 'genius.'

'What kind of genius loses a billion dollars in a single year?' Hillary Clinton said at a Monday rally in Ohio.

The Democratic presidential nominee had previously charged that Trump maybe didn't pay federal taxes for years and that's why he's holding back his returns.

Bill Clinton was campaigning for his wife today in Ohio. He's spending Tuesday and Wednesday touring the state by bus. He's set to rally her supporters tonight in Steubenville and tomorrow in Youngstown and Canton.

A spokesman for Bill said he Tuesday he did not know if the former president would be attending the next debate, this Sunday, in St. Louis, Missouri.

Bill and daughter Chelsea sat front and center at the first one. Trump says Chelsea's presence dissuaded him from talking about the Clintons' marriage that night.

With his poll numbers down, Trump says he's considering it as a tactic in next week's match and has talked about Bill's impeachment for 'lying' on the stump.

Before tonight's vice presidential debate, Clinton's Campaign Manager Robby Mook addressed reporters and said he was doubtful The Donald would actually deploy that tactic.

'He has stated that he intends to make all kinds of salacious attacks, we actually don't think he will,' Mook said in the spin room.