Former Vice President Joe Biden hinted at how seriously he was considering a presidential run, calling himself 'the most qualified' person for the job during a stop on his book tour.

Biden, 76, who passed on a run in 2016, when he was President Obama's sitting vice president, said Monday night he was best suited to taking the fight to President Donald Trump.

'I'll be as straight with you as I can. I think I'm the most qualified person in the country to be president,' Biden told a crowd in Missoula, Montana, while promoting his book.

'The issues that we face as a country today are the issues that have been in my wheelhouse, that I've worked on my whole life,' he said, the Hill newspaper reported.

Former Vice President Joe Biden says he is the 'most qualified person in the country' to be president. Biden, 76, is considering a run against President Donald Trump. He spoke during a stop for his book tour in Missoula, Montana

Biden, who served in the Senate from 1973 until he was sworn in as vice president in 2009, stressed his experience – a pitch that Hillary Clinton made in her own unsuccessful 2008 primary campaign.

'No one should run for the job unless they believe that they would be qualified doing the job. I've been doing this my whole adult life, and the issues that are the most consequential relating to the plight of the middle class and our foreign policy are things that I have – even my critics would acknowledge, I may not be right but I know a great deal about it,' Biden said.

Biden once chaired the Senate Foreign Relations Committee and carved out responsibilities dealing with Iraq and other trouble spots during the Obama administration.

Biden, who spent more than three decades in the Senate, points out a friend in the crowd at the Padua Academy to President Jimmy Carter during a fundraiser. Carter spent the evening in Wilmington campaigning for Biden during his run for a second term

Vice President Joe Biden takes his sunglasses off as he arrives for a campaign event with President Barack Obama at Strawbery Banke Field in Portsmouth, New Hampshire, September 7, 2012

ME TOO: Senate Judiciary Committee Chairman Joseph Biden D-Del. holds up a copy of the FBI report on Anita Hill during committee hearings on Capital Hill as Biden questions the Oklahoma law professor about her allegations against Judge Clarence Thoma

U.S. Vice-President Joe Biden (R) and General Motors CEO Mary Barra look at the new Corvette C7 attend the North American International Auto Show industry preview at Cobo Hall on January 16, 2014 in Detroit, Michigan. Some Democrats believe Biden could perform better in Michigan, Wisconsin, and Pennsylvania than Hillary Clinton did in 2016 and provide a path to victory

At 76, Biden is younger than Bernie Sanders, 77. President Trump is 72

Biden began his Senate service in 1973

He also has a long career focusing on domestic topics such as the Violence Against Women Act, which he helped author. But it is unclear whether his role chairing the Clarence Thomas hearings at the Senate Judiciary Committee during Anita Hill's famous testimony will pose a problem during the '#MeToo' era.

'I'm ready to litigate all those things, the question is what kind of nation are we becoming? What are we going to do? Who are we?” Biden said.

With a wide open field of Democrats, Biden pledged: 'Whether or not I run, whoever runs, I'm going to break my neck to make sure they win. We can't have four more years.”

The 77-year-old Vermont independent Sen. Bernie Sanders is already assembling a staff for a possible run.

'This time, he starts off as a front-runner, or one of the front-runners,' said Sanders' 2016 campaign manager, Jeff Weaver, the Associated Press reported.

California Sen. Kamala Harris, herself a Judiciary panel member, says she'll decide on her plans over the holidays.

Biden, passed on a run in 2016, citing the death of his adult son, Beau, in 2015, while facing a daunting primary against Hillary Clinton. Among those states Clinton lost to Trump were Pennsylvania, where Biden was born.

Biden invoked his grandchildren as one factor in his decision, saying he wants to be there to help care for them.

'We're going to make that decision in the next six weeks to two months, and that's the basis of the decision,' he said.