Biden predicted in the ’90s that by 2020 he would be “dead and gone.”

President Biden made the bold prediction in the early 1990s that he would be “dead and gone” by 2020 — the year he actually ran against then-President Donald Trump in the presidential election.

Biden’s remarks came in 1991 during a speech at Detroit College of Law during his tenure as a US Senator from Delaware – a post he held for more than 35 years.

Speaking to law students at the time about the importance of choosing Supreme Court justices, Biden, who was about 50 at the time, said, “The decision will have ramifications for what happens in this country long after Senator Biden is gone, long after President Bush is gone, long after President Reagan’s administrations are forgotten.”

“If they live – if justice [David] Souter, God willing, now living as long as the court’s average age, he will make game-changing decisions in 2020. I will in all likelihood be dead and gone,” added the then-senator. Biden, who turns 81 in November.

NY TIMES article on Biden’s age dismissed as ‘drooling’ and ’embarrassing’ after last fall

Biden’s comments in the footage, resurfaced by the New York Post, showed he was wrong on both counts. Souter retired in 2009 after nearly 20 years of service on the Supreme Court, and Biden is still alive today.

Should Biden win re-election next year, he will be 86 at the end of his second term. As his age burns in Americans’ minds, Biden has raised concerns — some even coming from within his own party — about his ability to lead the nation as he ages.

Last year, Minnesota Assemblyman Dean Phillips, Democrat, suggested it was time for Biden to retire gracefully.

“I think he did an excellent job as the bridge he promised to be,” Phillips told the Wall Street Journal. “The problem is that it’s just about time a new generation of leaders took part.”

“You can see the differences between who he used to be and who he is now,” Liano Sharon, a delegate for the Democratic National Committee, told the medium, adding that Biden “lost a step.”

Despite numerous faux pas and misadventures, Biden admitted last October that questions about his age were “entirely legitimate.”

“I think it’s legitimate to worry about someone’s age, including my age. That’s perfectly legitimate. But I think the best way to judge is to watch me. Am I slowing down? Don’t I have the same pace?” Biden said in an interview with MSNBC.

Earlier this month during a trip to Lithuania to bolster support for Ukraine war with RussiaBiden made several speech errors, including confusing the two nations and their leaders.

WATCH: BIDEN CONFUSES UKRAINE FOR RUSSIA, ZELENSKYY FOR PUTIN DURING TRIP-FILLED ERRORS TO LITHUANIA

Biden referred to Ukrainian President Volodymyr Zelenskyy as “Vladmir,” seemingly confusing Zelenskyy with Russian President Vladimir Putin.

Apparently unaware of his mistake, Biden went on to say he “shouldn’t be so familiar” and referred to Zelenskyy as “Mr. Zelenskyy.”

In a later post-summit speech, Biden confused the two nations, referring to Ukraine as Russia.

“Russia could end this war tomorrow by withdrawing its forces from Ukraine, recognizing its international borders and stopping its attacks – its inhumane attacks – on Russia – I mean Russia on Ukraine,” corrected Biden.

In another interview with the magazine in May, Biden tried to allay concerns about his age by calling his 80-year life experience a positive rather than a negative.

“Because I’ve picked up a hell of a lot of wisdom,” Biden told MSNBC’s Stephanie Ruhle when asked “why an 82-year-old Biden” would be the “right person for the most important job in the world” in 2024.

“I know more than the vast majority of people. I have more experience than anyone who has ever run for office, and I think I’ve proven that I’m both honorable and effective,” he said at the time.

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Biden is the oldest person to ever hold the office of President, and by Election Day 2024 he will be nearly 82 years old.

Fox News’ Anders Hagstrom, Andrew Mark Miller and Brandon Gillespie contributed to this report.