It's official.

Joe Biden is in.

The former U.S. Vice President, who mounted failed presidential campaigns in 1998 and 2008, is hoping 2020 will be his year.

The highly recognized Democrat joins a crowded field of presidential contenders.

But he's already run into political headwinds… having to defend himself against allegations he made women feel uncomfortable with unwanted touching.

Despite the complaints, the 76-year-old is moving ahead, and is hoping his decades of political experience will propel him to the White House.

He was Delaware's longest serving U.S. Senator -- re-elected to office seven times.

And then went on to serve two terms as former President Barack Obama's VP.

In most national polls, Biden remains widely popular.

But his party has shifted to the left since he last held office.

SOUNDBITE: STEVE HOLLAND, SAYING: 12:24:08 "Joe Biden will face questions about whether he's progressive enough, liberal enough for the left of the Democratic Party.

He will appeal to the Moderates in the Democratic Party, but the left is what's driving all the energy right now and so Joe Biden will have to find a way to bridge the gap." "What Biden is likely to argue is that he's the more electable of this group of Democrats.

That he can appeal to even some Republicans who are tired of Trump." And Biden will have to answer for his record.

He chaired the 1991 confirmation hearings for Supreme Court Justice Clarence Thomas and was criticized for not doing enough to protect Anita Hill, who accused Thomas of sexual harassment.

Biden has since apologized.

SOUNDBITE: STEVE HOLLAND, SAYING: 12:25:31 "Joe Biden was seen as sort of callous toward her, he did not treat her properly.

It will stand out in today's times of MeToo movement.

It will definitely be a problem for him, he will have to explain what happened back then and how it compares to now and how he's learned a lesson on how to treat people." His record on foreign policy will also likely be scrutinized.

In 2002, he voted to authorize military intervention in Iraq, but later said he regretted his vote.

SOUNDBITE: STEVE HOLLAND, SAYING: 12:26:32 "What he's probably gonna say is that President Bush laid out intelligence suggesting that Iraq did possess weapons of mass destruction and that he went along with this vote." Biden is hoping his third presidential bid will be the one that finally puts him in the Oval Office.