U.S. Democratic presidential candidate Hillary Clinton and Republican presidential candidate Donald Trump debate during the second presidential debate at Washington University in St. Louis, Missouri, Oct. 9. (Robyn Beck/AFP/Getty Images)

A defiant Donald Trump in the face of a backlash over his lewd remarks attacked Hillary Clinton on her husband’s sexual misconduct and vowed to jail her in the email row if elected, as the Democratic nominee was declared the winner of the bitter second presidential debate at Washington University in St. Louis, Missouri, Oct. 9, write Lalit K. Jha and Yoshita Singh – @siliconeer #siliconeer #2016USPresidentialPolls #Trump #Hillary #HillaryClinton #DonaldTrump #TheDonald

In the second presidential debate that turned nasty from the start, Clinton did not shake hands with the 70-year-old Republican nominee as the two rivals walked on the stage at the Washington University – a clear sign of the escalated rivalry between them – before proceeding for the fiery 90-minute clash attacking each other’s character.

Polls conducted soon after the showdown, which was the most tweeted presidential debate ever, declared the Democrat as the winner though they did give Trump the credit for “exceeding expectations.”

The 68-year-old former secretary of state attacked Trump over his plans to ban Muslims entering the U.S., saying it will be “shortsighted” and “dangerous” to engage in his “demagogic rhetoric” about the community as the two clashed on Obamacare, taxes and Islamaphobia in the second segment of the town-hall style debate.

When pressed on whether the ban is no longer his position, Trump called it an “extreme vetting from certain areas of the world.”

While Clinton alleged that the real estate tycoon’s 2005 video of lewd and sexually explicit remarks against women – that jolted his White House campaign and prompted a top Republican leaders to abandon him – reflects “the real” Trump, he accused her husband Bill Clinton of sexual assault of women over the past several decades.

Trump said he was “very embarrassed” with the video that surfaced on Friday and “hated” it but dismissed the recording as “locker room talk” in response to a question in the early phase of the debate that quickly turned into an acrimonious discussion over the clip in which he was heard using vulgar language and talking about groping women without consent.

Under pressure following the backlash over the video as well as his past performance at the first presidential debate on Sept. 27, which media said was “agitated” and “ignorant” Trump appeared defiant.

The billionaire also vowed, if elected as the U.S. President, to launch a special investigation against Clinton over her use of a private email server during her tenure as secretary of state under U.S. President Barack Obama from 2009-2013 and ensure she is jailed.

“If I win, I’m going to instruct the attorney general to get a special prosecutor to look into your situation because there’s never been so many lies, so much deception,” Trump said.

Clinton hit back, saying “everything he just said is absolutely false, but I’m not surprised,” she said.

“Oh, really?” Trump remarked.

“It is just awfully good that someone with the temperament of Donald Trump is not in charge of the law in our country,” Clinton said.

“Because you’d be in jail,” Trump said in another interruption.

Faced with a make-or-break situation in his campaign, Trump convened a surprise meeting of women who have previously accused former president Bill Clinton of sexual misconduct, just hours before the debate, the second of three planned debates before the November 8 election. The final showdown will be held on October 19 in Las Vegas.

During the debate moderated by CNN news anchor Anderson Cooper and ABC’s Martha Raddatz, a Muslim named Gorbah Hameed asked the two nominees on how they will help people like her deal with the consequences of being labeled as a threat to the country after the election is over.

When pressed on his controversial call for ban by moderator, Trump said the ban in “some form has morphed into an extreme vetting from certain areas of the world.”

Trump said he did not want to see hundreds of thousands of people coming in from Syria “when we know nothing about them, we know nothing about their values, and we know nothing about their love for our country.”

Clinton shot back, saying: “We are not at war with Islam.” She said Trump’s “extremely unwise” and “even dangerous” comments about Muslims are used to recruit terrorists.

The CNN/ORC poll of debate watchers said Clinton was the “clear winner” in the contest, with 57 percent saying Clinton won as opposed to 34 percent for Trump. CNN said it was a strong showing for Clinton, but not as good as her performance at the first presidential debate, when 62 percent of debate watchers said she won.

Trump denied actions he bragged about on tape. The former reality TV star refrained from giving a direct answer to the question if he actually kissed women or groped them without consent. “I have great respect for women.

“Have you ever done those things?” Cooper asked again.

“And I will tell you: No, I have not,” Trump said.

“Nobody has more respect for women than I do … I’ve said things that, frankly, you hear these things I said. And I was embarrassed by it. But I have tremendous respect for women.

“If you look at Bill Clinton, far worse. Mine are words, and his was action. His was what he’s done to women. There’s never been anybody in the history politics in this nation that’s been so abusive to women. So you can say any way you want to say it, but Bill Clinton was abusive to women,” Trump said, adding Hillary Clinton “attacked those same women and attacked them viciously.”

Clinton, meanwhile said “if this were just about one video, maybe what he’s saying tonight would be understandable, but everyone can draw their own conclusions at this point about whether or not the man in the video or the man on the stage respects women.”

“But he never apologizes for anything to anyone,” she added.

Clinton also said that for the first time a foreign power is trying to influence the presidential election in all likelihood for Trump, whom she accused of being close to Russian President Vladimir Putin.