CHICAGO — Democrats are basking in a newfound feeling of political “magic” and enthusiasm one month after President Biden’s politically tectonic decision to throw in the towel.

Now that he is out of the race, Democrats believe they have a serious shot at victory under Vice President Kamala Harris and have likened the mood to the early days of former President Barack Obama’s 2008 campaign.

“The enthusiasm is off the charts,” former Kansas state Rep. Raj Goyle, a friend of Harris who has known her since 2008, said about the state of the race one month after Biden’s withdrawal.

Goyle recounted his work in the early days of former President Barack Obama’s political rise and reflected that this feels like “the same energy and perhaps even more so because the stakes of defeating Donald Trump are so high.”

Both Barack and Michelle Obama addressed the convention Tuesday, electrifying the United Center — which was jam-packed with Democrats — with their famously dynamic oratory skills.

“Something wonderfully magical is in the air, isn’t it? Not just here in this arena, but spreading all across this country we love. A familiar feeling that’s been buried too deep for too long,” Michelle Obama proclaimed.

“It’s the contagious power of hope!” she added.

Barack Obama’s political ascension in 2008 culminated in a landslide victory in which he won by roughly 9.5 million votes, including a number of states such as Florida and Ohio that are seemingly now out of reach for his party.

Democrats also swept the House and clinched a filibuster-proof majority in the Senate.

During her speech, the former first lady made no reference to Biden, 81, though her husband did, commending him as “an outstanding president who defended democracy at a moment of great danger.”

Former President Donald Trump and his allies have been eager to capitalize on any perception of bad blood between Biden and Democrats at the convention. Senior Trump adviser Brian Hughes stressed to reporters Wednesday that Biden was barely mentioned during the second night of programming at the convention.

“[It’s] more evidence that Harris and the DNC are desperate to sort of gaslight America and detach her from the horrible record that she shares with Joe Biden,” he said at a counter-press conference at the Trump Hotel Chicago.

“Michelle Obama encouraged folks last night to do something as if they aren’t currently in residence at the White House,” he chided, referencing the former first lady’s clarion call to “do something.”

Trump, 78, himself gloated that Biden is “seething” and “unhappily sunbathing on a Beach in California, watching the waves, and thinking how much he hates Barack Hussein Obama, Crazy Nancy Pelosi, and Lightweight Movie ‘Star’ George Clooney, who failed to come to Crooked Joe’s defense.”

But Moe Vela, a former senior advisor to Biden, was adamant that isn’t the case.

“I know Joe Biden, right, and I’ll tell you something, he is he’s not pouting. He doesn’t pout. He’s not a grudge-holder. The man’s heart has a heart of gold,” Vela told The Post. “He loves Vice President Kamala Harris.”

“I’m sure that he left California because he wants to get out of the way and make this her convention. This is her time. He has passed the torch to her. People looking for negative stuff are going to find whatever they make up,” he added.

Prior to Biden’s exit, many Democrats had been in a state of despair, sweating over alarming poll numbers pegging Trump with a strong advantage ahead of the Nov. 5 election.

Voters “had a deep concern about whether or not President Biden was able to do the job for the next four years,” Goyle admitted, alluding to consternation about the president’s age and mental acuity.

He claimed the angst about Biden was not an indictment of his performance, insisting that the president’s policies are popular.

Vela echoed that assessment.

“[Biden] came to the realization that many people had come to, which was that our chances of winning with him as the nominee were diminishing,” Vela said, while commending Biden for “putting our nation and our democracy and our people first over his own self-interest.”

The Obamas’ speeches Tuesday evening helped evoke a sense of nostalgia among many Democrats, eager for a repeat of the monster 2008 blue wave.

“One of the main reasons that Harris ’24, feels like Obama ’08 is that she is rejecting a politics of fear and embracing one of joy … and yes, hope. After 9 years, of talking about Trump, her campaign is about something bigger, more joyous, and more fun,” former Obama senior adviser Dan Pfeiffer posted on X.

Democrats are still pummeling Trump. Michelle Obama, famous for her aphorism of “When they go low, we go high,” raked Trump over the coals in a fiery speech Tuesday that threw shade at him over his wealth, comments on race and more.

“Going small is petty, it’s unhealthy, and, quite frankly, it’s unpresidential,” she said in a scathing rebuke of Trump. “It’s his same old con: doubling down on ugly, misogynistic, racist lies as a substitute for real ideas and solutions that will actually make people’s lives better.”

Ironically, hours before her speech, Trump said that he has “respect” for the former first lady.

Down ballot, Democrats are also sounding more confident about their prospects.

“I am telling all of you now: This year, we are going to hold the Senate again — and are poised to pick up seats,” an exuberant Senate Majority Leader Chuck Schumer (D-NY) told conventional attendees Tuesday.

On Tuesday, the official House Democratic campaign arm — the Democratic Congressional Campaign Committee — touted a $17.6 million haul for July, ending the month with $92 million cash on hand. Its fundraising efforts have rattled House Republicans.

Since Biden stepped aside, Harris has rapidly gained ground in the polls against Trump, jumping ahead of him in the RealClearPolitics aggregate of a national race, and running dead even with the former president in numerous battleground state polls.

Some of Trump’s senior advisers have told reporters that they believe Harris enjoyed a sugar high and have seen indications that her polling bump has come to an end.

“I need to find the lab that created this special sugar because this high is going 31 days and shows no signs of stopping,” Goyle quipped.

Yet both Trump’s and Harris’ allies seem to believe that the polls are significantly understating support for the 45th president, noting how he outperformed a lot of polling in 2016 and 2020.

“Instead of calling it a risk, I call it in reality,” Vela said, referring to a contingent of hidden Trump voters as the “embarrassed vote.”

“You just need to go out and bust your butt and knock on more doors and make more calls and get the vote out on your side to make up for that embarrassed vote.”

Harris has referred to herself as the “underdog” in the race. Trump appeared to agree with that assessment, telling The Post that “She should be the underdog because she did such a bad job.”

“Never before in American history has there been a campaign that started this late. And the momentum was clearly with Donald Trump. So we’ve had to recover lost time and lost ground and there is more to do,” Goyle said.