Biden (80) announces 2024 re-election bid

WASHINGTON - President Joe Biden announced Tuesday he is running for re-election in 2024, plunging at the record age of 80 into a ferocious new White House campaign "to finish the job."

"Every generation has a moment where they have had to stand up for democracy. To stand up for their fundamental freedoms," Biden wrote on Twitter, along with a video.

"I believe this is ours. That’s why I’m running for re-election as president of the United States. Join us. Let's finish the job."

After a series of big legislative wins and momentous foreign policy struggles in his first two years in office, Biden has no real challenger from within the Democratic Party.

But in a campaign that may result in a rematch of the 2020 election against Donald Trump, he is expected to face constant and fierce scrutiny over his age.

The veteran Democrat would be 86 by the end of a second term. Even if a medical exam in February found him "fit" to execute the duties of the presidency, many including in his own voter base believe he is too old.

An NBC News poll released over the weekend found that 70 percent of Americans, including 51 percent of Democrats, believe he should not run.

Sixty-nine percent of all respondents who said he shouldn't run cited concerns over his age as a major or minor reason.

Biden likes to answer those concerns by saying, "watch me" -- meaning that voters should focus on his policy wins at home and his marshaling of an unprecedented Western alliance to help Ukraine defend itself against Russia's invasion.

Over the next year and a half, Biden will have all the advantages of incumbency, backed by a united party, while Republicans are only just starting a messy primary season.

Biden's approval ratings have not topped 50 percent for more than a year and a half. 

However, he has consistently over-delivered when it matters. Supporters say the Democratic Party's surprisingly strong performance in 2022 midterm congressional elections validated the Biden brand.

And while Biden may seem bland in comparison to Trump, he would bank on his moderate, old fashioned image being the secret weapon needed in an increasingly extreme era.