Democrats on Capitol Hill were growing alarmed Tuesday at a lack of direct communication from President Biden since his historically bad debate performance against former President Donald Trump last week.

A senior Democratic aide told The Post Tuesday that Biden, 81, had not reached out to any lawmakers to reassure them — as would be expected following a debacle on the scale of the commander in chief’s globally televised meltdown June 27.

“You can’t have the problem you’ve had — then go to a campaign rally and think the box is checked,” added a Democratic strategist who suggested that Biden should have tried to allay concerns by going on one or more of the Sunday public affairs shows this past weekend.

As of Tuesday afternoon, just one sitting Congressional Democrat — Rep. Lloyd Doggett of Texas — had called on Biden to bow out of the race, and another — Rep. Jared Golden of Maine — suggested it did not matter since it “has been clear … for months … Donald Trump is going to win.”

But other lawmakers, in a sign of growing consternation, were making increasingly pointed criticisms of the White House and Biden campaign spin that the incumbent had just had “a bad night” in Atlanta.

“We have to be honest with ourselves that it wasn’t just a horrible night,” Rep. Mike Quigley (D-Ill.) told “CNN This Morning” Tuesday.

“I won’t go beyond that out of my respect and understanding for President Joe Biden, a very proud person who has served us extraordinarily well for 50 years” he went on. “I just want him to appreciate at this time just how much this impacts, not just his race, but all the other races coming in November.”

Quigley, 65, added that he wasn’t sure what, if anything, would persuade Biden to exit the race.

“I don’t know if this polling is. It probably takes, what, three, four, five [days], up to a week to get decent polling?” he said. “So, I assess we’ll probably get that starting today or tomorrow. The holiday will make polling more difficult.”

“I do think that’s probably the only thing out there right now that could change his mind or influence that critical decision that, again, only he can make.”

A day earlier, Sen. Peter Welch (D-Vt.) criticized the Biden camp for labeling as the “bedwetting brigade” those who had raised alarm about the debate.

“I really do criticize the campaign for a dismissive attitude towards people who are raising questions for discussion. That’s just facing the reality that we’re in,” Welch told Semafor.

What to know about the calls for President Biden to drop out of the 2024 race:

• President Biden’s poor performance in the first 2024 presidential debate left some Democrats unsure of his fitness for office and future as the party’s candidate.
• More than a dozen congressional Democrats have joined in calling for Biden’s exit from the race. Former Biden supporter George Clooney echoed these calls in an op-ed published in the New York Times just weeks after he helped lead a record-breaking fundraiser for the Democrat.
• Democratic voters have continued to raise concerns about Biden’s nomination since the debate, with speculations and suggestions for replacement nominees running rampant.
• Biden’s former running mate Barack Obama has reportedly been trying to pressure him to drop out, and had prior knowledge of Clooney’s op-ed. Former House Speaker Nancy Pelosi allegedly told Biden he could not beat former President Donald Trump this time around.
• As the Democratic National Convention approaches, California delegates for the Democratic Party are reportedly in disarray as debate over the president’s chances of re-election threatens to tear the party apart.
• However, the Biden campaign has denied any plans for Biden to bow out and for Kamala Harris to step in as the Democratic nominee. Sources close to the president believe he might not be willing to drop out, while other sources claim he is “receptive” to giving up on a second term.

“The campaign has raised the concerns themselves. So then to be dismissive of others who raise those concerns, I think it’s inappropriate.”

Welch’s fellow New Englander, Sheldon White House (D-RI) told a local news outlet Monday that he was “was pretty horrified by the debate.”

“The blips of President Biden and the barrage of lying from President Trump were not what one would hope for in a presidential debate,” told WPRI.

“I have never seen that happen before.”

The Post reported Monday night that Democratic donors are willing to give the Biden campaign a two-week “grace period” for polling numbers to recover from any debate-related drop before pressing for a change at the top of the ticket.

Meanwhile, CNN reported that Democratic Minnesota Gov. Tim Walz organized a Monday night call of his fellow Democratic state leaders — none of whom had heard directly from Biden.

The White House promised to remedy the situation Tuesday afternoon, saying meetings with both Democratic governors and congressional leaders were in the works.

Biden’s campaign has rejected speculation that he would consider dropping out and insisted that he still plans to partake in the scheduled Sept. 10 ABC News debate against Trump.