After the debate debacle, top Democrats Pelosi and Clyburn acknowledge the legitimacy of concerns about Biden's age.

• Pelosi and Clyburn stated that it is reasonable to question Biden's fitness after his subpar debate performance.
• Some high-profile Democrats, including Pelosi and Clyburn, have publicly validated recent anxieties about the president's ability to win against Donald Trump in the upcoming campaign.
• Rep. Lloyd Doggett, a Democrat, was the first to publicly urge Biden to abandon his presidential campaign.

Pelosi and Clyburn of California and South Carolina, respectively, stated that it is justifiable to question Biden's fitness after his subpar debate performance last week.

Pelosi stated in an MSNBC interview that it is a valid question to ask, "Is this an episode or is this a condition?" when referring to both Biden and Trump.

In a separate MSNBC interview, Clyburn stated that it is reasonable to question whether Biden's debate performance is a sign of a larger medical issue, but he acknowledged that he is not a doctor and therefore cannot provide a medical opinion on the matter.

Clyburn added he has a phone call with Biden scheduled for later Tuesday.

Democrats are closely monitoring the extent of the damage caused by Biden's poor performance in the debate, as several polls suggest the rematch between Biden and Trump is still a close call.

A recent CNN poll published on Tuesday shows Trump leading Biden by 6 points in a head-to-head matchup, the same as the April survey's results. The margin of error for that question is +/- 3.7 percentage points.

The poll, conducted from June 28 to 30, surveyed 1,045 registered voters and reflects their immediate reactions following the debate.

Both Democrats pledged to continue supporting Biden throughout his presidential campaign.

Clyburn stated that he wants the ticket to remain Biden-Harris, and then they will assess what happens after the next election.

Biden's 2020 victory was aided by the endorsement of Clyburn, who was a crucial ally in securing support among Black voters.

Some high-profile Democrats have publicly validated recent anxieties about the president's ability to win against Trump in the upcoming election, as evidenced by their comments on Tuesday.

The floodgates for party members to publicly express their concerns may be pushed open further.

On Tuesday, Rep. Lloyd Doggett, D-T.X., was the first Democrat to publicly urge Biden to withdraw from the presidential race.

"Doggett stated in a press release that he hopes President Biden will make the difficult decision to withdraw, as unlike Trump, Biden's first commitment has always been to the country, not himself. He respectfully called on him to do so."

A Biden campaign official confirmed to NBC News that the president intends to continue his campaign.

Adam Frisch, the Democratic candidate who narrowly lost to Republican Rep. Lauren Boebert in Colorado's previous election, echoed the sentiment: "We deserve better. President Biden should prioritize the country's interests and withdraw from the race."

The Biden campaign did not immediately respond to a request for comment regarding Pelosi and Clyburn's TV appearances.