The man arrested by Miami Beach police Tuesday for allegedly threatening President-elect Donald Trump online is a member of a prominent northeast family close to Bill and Hillary Clinton.

He once gave $20,000 to the Democratic National Committee, DailyMail.com has learned.

Dominic Puopolo, 51, is being held without bail in Miami on charges of threatening harm against a public servant

Suspect Dominic Puopolo Jr., 51, sat near Hillary Clinton when she delivered the eulogy at the funeral of Puopolo's mother, Sonia, who died in one of the jets that flew into the World Trade Center on 9-11.

During that eulogy on Oct. 6, 2001 in Boston, the former presidential candidate referred to 'Dom Jr.'s latest computer wizardry.'

The 'wizard' is now being held in a Miami-Dade County jail after using Twitter to threaten Trump's life.

Trump is scheduled to be sworn in Friday in Washington, D.C. as Puopolo remains incarcerated on a charge of threatening to harm a public servant.

Puopolo reportedly admitted to posting a video to Twitter, saying: 'This is the 16th of January 2017, I will be at the review/ inauguration and I will kill President Trump, President elect Trump today.'

Hillary Clinton sits with the Puopolo family at the funeral of Dominic Puopolo's mother Sonia, who was among 92 people on American Airlines Flight 11 on Sept. 11, 2001, when it crashed into the World Trade Center's north tower

He was nabbed after leaving a Washington Avenue Subway sandwich shop about 4 p.m. Tuesday.

Puopolo, however, may not be the average Trump hater.

On various social media platforms, where he posts as JesusChrist1701, the computer consultant claims to have testified in terror cases as an expert witness in a German federal court in Hamburg from 2003 to 2008.

He also says he served in the Navy.

He once posted a photo of himself holding an image of his mother in front of a wall that sports a picture of him with Colin Powell and a famous shot of Ronald Reagan.

Puopolo has published a number of pictures of outgoing Secretary of State John Kerry, whom he calls a friend.

Both Hillary and Bill are close friends of the Puopolo family. The suspect, according to federal elections records, gave $20,000 to the Democratic National Committee in 1996

According to news archives his mother, Sonia Mercedes Morales Puopolo was married to the wealthy Nantucket businessman Dominic J. Puopolo Sr.

She was once a professional ballet dancer and became a major philanthropist and political donor.

However, Sonia was among 92 people on American Airlines Flight 11 on Sept. 11, 2001, when it crashed into the World Trade Center's north tower in New York City.

She was two seats away from terrorist Mohammad Atta.

In an amazing twist of fate, Ground Zero cleanup crews recovered the wedding ring that Sonia's husband had given her 40 years earlier.

The suspect's sister, Miami resident Sonia Tita Puopolo, wrote a book in 2010 about the ring called Sonia's Ring: 11 Ways To Heal Your Heart, Miracles Do Happen, and even ended up on Ellen DeGeneres' show to discuss it.

Sonai gave $4,000 to Hillary Clinton's various campaigns

Dominic Puopolo posted this picture of President Clinton with his sister Sonia (left) and his mother Sonia, who was killed in one of the planes that flew into the World Trade Center

The suspect's sister, Miami resident Sonia Tita Puopolo above with Hillary at left, wrote a book in 2010 about the ring called Sonia's Ring: 11 Ways To Heal Your Heart, Miracles Do Happen about her mother, at right with Hillary

The family is also known in political circles for its generosity toward Democratic organizations and candidates.

The threat suspect, according to federal elections records, gave $20,000 to the Democratic National Committee in 1996. He also contributed to Kerry and deceased Sen. Ted Kennedy in the mid-1990s. His name popped up again in contributions in 2006 when he gave $4,000 to Florida Sen. Bill Nelson's campaign.

His sister Sonia gave $4,000 to Hillary Clinton's various campaigns.

In Miami, meanwhile, Dom Puopolo was arrested four times for petty crimes since 2006, twice for petty theft and once for defrauding an innkeeper.

There's also evidence he was the target of mental health court proceedings in 2016 although the details are not public.

When he was arrested in March, the judge ordered Puopolo to be represented by a tax-funded public defender after declaring him 'indigent.'

Property records, however, indicate Puopolo sold a family home in Dover, Mass. in 2013 for $4 million. And in 2004, he sold a condo in downtown Miami for $3.3 million.

He currently lives in a run-down $60,000, one-bedroom flat in Miami Beach.

Neither Puopolo's sister, nor dad or brother returned calls for comment.