Regardless of Chuck Schumer and Nancy Pelosi's titles—and to the comical dismay of corporate, establishment Democrats—Bernie Sanders has become the defacto leader of the Democratic Party.

Sunday in Warren, Michigan put an exclamation point on the sentence, as Sanders, alongside Schumer, brought out 8,000 people on a bitterly cold winter day to fight against Obamacare repeal.

Even the establishment media is waking up—granted a year too late.

"That's the future of the Democratic Party," Joe Scarborough, echoing Mika Brzezinski's sentiment, said on Morning Joe Monday. "He sounds just as relevant today as he did a year ago."

So, as the mainstream media opportunistically tries to Feel The Bern after ignoring Sanders when it mattered (both CNN and MSNBC recently held primetime town halls with him), you know who's become less relevant?

Senator Elizabeth Warren.

The one-time progressive rock star—who activists tried to summon to run in 2016 with hopes of bringing down Hillary Clinton—has already made moves that many inside the Beltway believe are a precursor to a run in 2020.

But, much to the shock of genius corporate journalists who continue to live in their alternate, elitist bubble and obsess over Donald Trump's tweets rather than the endless struggles of working people, the progressive movement has soured on one if its past heroes.

A majority of progressive voters and activists I spoke to during my campaign reporting were disgusted with Warren's cowardice during the Democratic Primary, where she dodged on endorsing the most progressive candidate to run since FDR.

The firebrand, anti-Wall Street Senator was wildly popular in her home-state of Massachusetts, but she decided not to endorse Sanders before the Super Tuesday primary. Sanders lost Massachusetts by less than two points, causing progressives to believe the state—and momentum—would have gone to Sanders had Warren endorsed and campaigned with him across the state.