Rep. Dean Phillips of Minnesota is jumping into the 2024 White House race with a long-shot Democratic primary challenge against President Biden.

The campaign launch by the millionaire businessman and co-founder of a gelato company turned three-term House Democrat comes as the 80-year-old president continues to suffer from underwater approval ratings among many Americans and faces serious concerns over his physical and mental stamina.

Phillips filed paperwork with the Federal Election Commission on Thursday to officially set up his presidential campaign, and his website www.dean24.com went live in the evening.

"I am excited to announce my candidacy for President in 2024. It’s time to put our country back together again – and use our differences to make us stronger. It’s time to repair America," Phillips said in a launch video posted on social media on Thursday evening.

BIDEN BREAKS CENTURY OLD TRADITION AS HE FORGOES FILING FOR THE PRIMARY IN THIS STATE

And when asked in an interview with CBS News if he's running for president, the 54-year-old Phillips answered "I am. I have to." The recorded interview is scheduled to be broadcast Friday morning.

Friday morning is also when Phillips, who represents a congressional district in suburban Minneapolis, will formally declare his candidacy in New Hampshire, the state that for a century's held the first primary in the presidential nominating calendar.

Phillips, one of the wealthiest members of Congress, is scheduled to hold a campaign launch event outside the New Hampshire Statehouse in Concord. And Phillips will enter the Statehouse and file at the Secretary of State's office to place his name on the New Hampshire's presidential primary ballot.

A bus decorated with "Dean Phillips for President" was headed to New Hampshire earlier in the week, and is expected to take the candidate on a tour.

Phillips, citing the president's age, has repeatedly criticized Biden for "not passing the torch" to the next generation of Democratic leaders and urged that a serious primary contender challenge the president for the party's 2024 nomination.

CHECK OUT THE LATEST FOX NEWS 2024 PRESIDENTIAL ELECTION POLLING

When no other Democrats considered running against Biden, Phillips began to consider himself for the mission. Earlier this month, he told MPR (Minnesota Public Radio) News that "it’s healthy to have alternatives. I think voters are demanding it."

And in his CBS News interview, Phillips pointed to recent polling suggesting that former President Donald Trump is edging Biden in hypothetical 2024 general election matchups.

"I think President Biden has done a spectacular job for our country," Phillips said. "But it's not about the past. This is an election about the future."

While the president is the commanding front-runner for his party’s 2024 nomination, polls indicate Biden faces mounting concerns from Democrats over his age. Those surveys also suggest that many Americans - including plenty of Democrats - don't want the president to seek a second term in the White House.

The White House, when asked earlier this week about Phillip's expected candidacy, pointed to the lawmaker's "almost 100% support of this president."

Phillips — who recently stepped away from his leadership role as co-chair of the Democratic Policy and Communications Committee due to his potential White House bid — let lapse a September deadline he set for himself to decide whether he would launch a primary challenge against the president. And last week he missed a deadline to place his name on the ballot in Nevada, which is holding its presidential primary on Feb. 6 in the Democratic Party's nominating calendar.

According to the Democratic National Committee (DNC), which earlier this year upended years of tradition by revamping their longstanding nominating calendar, Nevada's supposed to vote second, along with New Hampshire, three days after South Carolina’s Feb. 3 kickoff primary. 

NEW HAMPSHIRE'S SUNUNU SAYS 2024 RACE IS ‘WIDE OPEN’ IN FIRST PRIMARY STATE

The revised scheduled was initially proposed by Biden, who came in a disappointing fifth in the 2020 New Hampshire primary before rebounding in Nevada and South Carolina enroute to winning the nomination and eventually the presidency.

But New Hampshire's on course move up the date of its primary to late January, in accordance with a state law that mandates the Granite State's presidential primary is held seven days ahead of a similar contest.

With New Hampshire to hold what is certain to be a primary that’s out of compliance with the DNC's revamped 2024 nominating calendar, Biden is avoiding the unsanctioned contest.

And on Tuesday, the president's 2024 re-election campaign announced that Biden would not file to place his name on New Hampshire's ballot. Top Democrats in the state now plan to mount a write-in effort on behalf of the president.

But there are concerns that anger among Granite Staters to the move by Biden and the DNC to revamp the nominating calendar, and the president's absence from the primary ballot, could serve as another distraction for Biden as he marches towards re-nomination.

Longtime New Hampshire Democratic Party chair Ray Buckley, who recently took a call from Phillips, told Fox News that "both polling and grassroots interactions in New Hampshire reveal a high level of support for President Biden among the likely voters."

"It would be a tough challenge for Phillips or anyone. But sure, c’mon on up!," Buckley says he told Phillips.

The president is already facing a long-shot primary challenge from best-selling author spiritual adviser Marianne Williamson, who is making her second straight White House run.

Biden was also facing an uphill primary challenge from environmental lawyer and high-profile vaccine critic Robert F. Kennedy Jr., who is a scion of arguably the nation’s most famous family political dynasty.

But Kennedy announced at a campaign event in Philadelphia earlier this month that he would seek the White House as an independent candidate.

The DNC is fully backing Biden, as the president campaigns for re-election. At its winter meeting in February, the DNC unanimously passed a resolution committing its "full and complete support" for the re-election of Biden and Vice President Kamala Harris. Additionally, it has said there will be no primary debates between Biden and any of his challengers.

Williamson, Kennedy and others in the party criticized the DNC and Biden, but there is political precedent for the move. No incumbent president has participated in primary debates in modern times. 

Jim Demers, a longtime New Hampshire-based political consultant and lobbyist who is helping to lead the write-in effort for Biden, terms a primary challenge by Phillips "a ridiculous idea."

"Democrats in New Hampshire support the president," Demers told Fox News. "So if his mission is to divide Democrats and help [former President] Donald Trump, then that’s what he’s doing."

Fox News' Kellianne Jones and Deirdre Heavey contributed to this report

Get the latest updates from the 2024 campaign trail, exclusive interviews and more at our Fox News Digital election hub.

If you or someone you know is having thoughts of suicide, please contact the National Suicide Prevention Lifeline at 988.

Lindsay Clancy, the Massachusetts mother accused of strangling her three young children with exercise bands earlier this year, pleaded not guilty Thursday to three counts of murder in connection with their deaths.

On Thursday, the 33-year-old was arraigned at Tewksbury Hospital on three counts of murder and strangulation after she was indicted in September in the deaths of her 5-year-old daughter, Cora, her 3-year-old son, Dawson, and her 8-month-old baby, Callan, before attempting suicide at her Duxbury home.

Kevin Reddington, Clancy's attorney, argued that she was suffering with mental health issues and "was a troubled soul."

LINDSAY CLANCY, MASSACHUSETTS MOTHER WHO STRANGLED HER 3 CHILDREN, RESEARCHED ‘WAYS TO KILL,' COURT DOCS SAY

However, prosecutors pointed to recently unsealed 299 pages of records and argued that that Clancy's alleged murders of her three children were deliberate and premeditated.

According to the documents, unsealed by the Plymouth District Court, Clancy's notebooks contained documentation of her medications and thoughts of suicide. 

Evidence collected through 11 search warrants from Clancy's home also found that she used her cell phone to document her mental state and to research ways to kill.

TIMELINE OF LINDSAY CLANCY CASE

The judge presiding over Thursday’s hearing ordered Clancy to continue treatment for the next six months at the hospital, where she has been receiving treatment following her suicide attempt in January. 

Her next appearance is scheduled for Dec. 15.

In the morning of Jan. 24, Clancy took her daughter to the pediatrician, called a local CVS store about a stool-softener prescription and ordered dinner at the ThreeV restaurant in Plymouth.

She also used Apple Maps on her phone "to determine the time it would take someone to travel from her home in Duxbury to ThreeV in Plymouth," according to court documents.

MASSACHUSETTS MOM LINDSAY CLANCY'S 911 DISPATCH REVEALS FRANTIC FIRST RESPONDERS

Clancy also allegedly texted her husband to see if he could go and pick up the takeout at the restaurant and medication at CVS.

When her husband, Patrick Clancy, arrived home, there was "silence," court documents said.

Eventually, he found blood on the floor and noticed an open window.

According to court documents, he ran outside to the backyard, and found Lindsay on the ground, conscious and with cuts to her wrists and neck, and immediately called 911.

The father of the three children allegedly found his children in the basement.

CLICK HERE TO GET THE FOX NEWS APP

Cora and Dawson were pronounced dead at the hospital on Jan. 24. 

Callan was flown to Boston Children’s Hospital with traumatic injuries and placed on life support but died on Jan. 27.

Fox News Digital's Chris Eberhart contributed to this report.