At 77 years old, former Vice President Joe Biden is now remarkably the youngest male candidate for president in the Democratic primary.

The status was shifted to Biden after former South Bend, Indiana, Mayor Pete Buttigieg, 38, announced he would be dropping out of the race on Sunday following a disappointing finish in the South Carolina primary. Also ending his campaign following the primary contest over the weekend was the second youngest candidate, 62-year-old billionaire hedge fund manager, Tom Steyer.

Critics of the former vice president have repeatedly expressed concern about his age throughout the nominating contest, questioning whether he has the physical health and mental sharpness to endure the presidency.

Speaking to a crowd of conservatives at CPAC over the weekend, President Donald Trump joked that, if elected, Biden would be governing from a home for the elderly.

"How could you be easier to beat than Joe? The guy can't put two sentences together," Trump said.

He added that Biden's "not going to be running the government. He's just going to be sitting in a home someplace and people are going to be running it for him."

But now, quite ironically, Biden can cast himself as the spring chicken of the race — at least among the men. Biden's two remaining male challengers are Sen. Bernie Sanders (I-Vt.) and former New York City Mayor Mike Bloomberg, both 78 years old. Bloomberg turned 78 last month and Sanders will turn 79 in September.

The female candidates still in the race are Rep. Tulsi Gabbard (D-Hawaii), 38, Sen. Amy Klobuchar (D-Minn.), 59, and Sen. Elizabeth Warren, (D-Mass.), 70.

Trump, who was also the target of questions about his age and health during the 2016 campaign, currently holds the record for oldest president in U.S. history. He was 70 years and 220 days old on the day of his inauguration, a figure which pales in comparison to the age of the leading male candidates on the Democratic side in 2020.

(H/T: The Daily Caller)