I would argue that there isn’t a "far-left" or "hardcore left" element in this country that has power. Bernie and the squad don't exactly run the Dems.
Since Regan there's really only been two dominant political ideologies; neoliberalism (economic) and neoconservatism (foreign policy). Everybody sort of fell into those boxes.
The people running the country have been neolibs with some rainbow sprinkles for diversity's sake. They'll do what they did under Regan and pull rightward to maintain power, if they're allowed to. They'll all become Blue Dogs if it keeps them seated.
The issue is that neoliberalism is dying overall, because it's failing to address the actual citizens concerns. It's why populism is rising, as seen in some really weird ways. Think of the bernie bros who voted Trump or the perfect example of the strangeness of American politics,
People who split ticket voted for Trump and AOC. They overwhelming just voted against the current ideology, even if they might no word it as such.
I don't think at
@amlove21 is wrong in his assessment that a new ideology needs established while you've got the chance.
Well, you could certainly say that but I think that you are demonstrably incorrect.
While the far left certainly has less power than it did over the last couple of nears, and will have even less come November, it does not mean they don't have power.
Measurements of power often involve the DIME construct--diplomatic, informational, military, and economic.
D: nearly 74 million people voted for VP Harris in the last election. From her position on abortion, immigration, guns, trans rights, crime, and a host of other issues, I don't think it's a stretch to say that she's the hardest-left presidential candidate that the Democrats have ever proffered. Even Pres Obama at least pretended to be somewhat-centrist the first time he ran for president. There are still something like 48 Ds in the Senate and the House is also close. "Less-powerful" does not mean "powerless."
I: Democrats have, until very recently, completely dominated the information space. For a long time it seemed like Fox was more or less alone and unafraid against a sea of information nearly completely controlled by the left. And since moderation doesn't sell, it was the far left. Democrats control entertainment; look at the movies that are getting produced. The television. The news. Look at how many entertainers (paid or not) who lined up to support Harris, and who they are. Numerous A-listers from Lizzo to Taylor Swift to George Clooney. All in the Democrats' bag (and, apparently, their pockets). The far left dominates academia. Much of the news. Almost all social media. Those things are ENORMOUSLY powerful. Even more so if you don't fuck it all up by dialing the weird-o-meter up to 11 and pissing off more than half of the population with your shenanigans and dumb ass policies.
M: The executive branch controls the military, and the top-most brass tends to be politically-sympathetic to the commander in chief, which is probably one of the reasons they ended up with those jobs. Also, many (most?) senior generals tend to be left of center on a host of issues. And for a long time, a lot of them (even ones who worked for him) lined up to oppose Trump. The far left also controls non-state actors with military power, like Black Bloc and rioters who show up for things like BLM burn-ins.
E: The far-left Democrat part raised (and spent) over a BILLION dollars in like three months on VP Harris' embarrassing loss to Pres Trump. There are plenty of wealth leftists, and oodles of uber-wealthy companies, who want to give money to far left causes. Everything from BLM to ESG.
To conclude: the far left in America is large, it's powerful, and it's angry. They still have power, and they are going to seek to use it.