Politico and The Hill are good weather vanes for the mood and spin of corporate Democrats.
For example, when Bernie introduced Medicare For All, Politico said this:

Did Democrats jump the gun with single-payer splash?
There's second-guessing inside the party about Bernie Sanders' timing as Republicans take aim again at Obamacare.

The Hill said this:

Ex-Obama spokesman 'not sure' about Sanders healthcare debate

It turns out they were just Concern Trolls.

That was a good example for the Corporate Democrats' strategy to retain power.

In August, the small-but-powerful remnant of big-money moderation in the Democratic Party, shaken but not stirred by Hillary Clinton’s defeat in 2016, officially declared war on the party’s left-leaning rank-and-file. Rising from the ashes of the defunct Democratic Leadership Council, the “centrist” movement that took over the Democratic Party after its three straight presidential defeats in the 1980s—and erased the last vestiges of New Deal liberalism from American political discourse in the name of winning elections—came a “new” effort called New Democracy, touted as a vehicle for “rethinking” the party’s message after its history-making loss to Donald Trump. But this grand reassessment, led by DLC co-founder Will Marshall and his K Street band of brothers, was merely a reassertion of the wealth-first economics, go-slow social progressivism, and hawkish foreign policy peddled by white Democratic power-brokers and Clintonian neoliberals for three decades now.
...the old organs of the Washington establishment still take these people seriously, and otherwise intelligent Democrats still have a strange Pavlovian response to the dire warnings they issue, like clockwork, every four years: Embracing liberalism will always and forever end in defeat

This mantra - that a sudden shift to the left will end in doom - has many examples, but it's best on display here.

Are Democrats Headed for a McGovern Redux?
As Trump continues his Nixonian campaign of white cultural-grievance politics, Democrats appear consumed by the same squabbles that destroyed them in 1972.

There are some parallels between 1972 and today, but then so is any and every election.
Still this same tired metaphor was used against Jesse Jackson in 1988, Howard Dean in 2004, Barack Obama in 2008, and Sanders in 2016.
Just like every 3rd party candidate is Nader in 2000.

The goal of these disinformation campaigns has always been the same: to frighten the left into falling in line with the moneyed masters of the party. And at a moment when the party is finally abandoning the New Democratic formula—suck up to big business and the military-industrial complex, pander to white supremacy, and win!—fear-mongering is the only thin reed of hope the “moderates” have to retain their supremacy in the party.

Just ignore the fact that Third-Way Dems consistently lose.

The old New Democrats know perfectly well that the chances of Trump winning reelection in 2020 are approximately as good as the Democratic nomination going to Kanye West, with Kim Kardashian as his running mate. They know there’s no valid analogy to be drawn between Nixon and Trump, or between McGovern and the leading lights of the contemporary left, or between 1972 and the likely political climate of 2020. That’s why they’re scare-mongering again—because they are scared. Not of the depredations of the Trump presidency so much as the near-certainty that the next Democratic nominee will run on single-payer health care, progressive taxation, queer rights and abortion rights, and an anti-imperialist foreign policy. And they know the next Democratic nominee will almost certainly be the next president—and will chase them out of the party leadership once and for all.
The only thing that can prevent the Democratic left from ascending to power in 2020 is paying heed to the myth of McGovernism.

Another spin is that Democratic voters are becoming "extreme" in their leftist values. This was on display with the recent Pew study.
Every article about this survey shows that liberals are as extreme as conservatives.
On some issues, like immigration and race, Democrats are far outside of historical norms. Coincidently, these are also identity politics issues.

However, on the question of should the government doing more to help the needy, it's not a "both sides do it" question. It's Republicans that are the extremists.
Also, ironically, Pew released this survey the very next day, but it got mostly ignored.

Americans deepest in poverty lost more ground in 2016

So who's the extremists on this issue?