Sanders warned Colorado voters that 'if we do not get our act together, this country is going to slide into oligarchy'

Senators Bernie Sanders (I-Vt.) and Elizabeth Warren (D-Mass.) appeared side-by-side in Denver on Sunday evening to once again make the case to progressive voters that a vote for Democratic presidential nominee Hillary Clinton is still a vote for "political revolution."

"To every person who 'felt the Bern' during during the primary, America and the Democratic Party know the power and energy of the progressive movement," Warren told the 1,700 who packed the Auraria Campus student union. Sanders won the March caucus in the pivotal battleground state, where Clinton is now polling an average of nine points ahead of Republican rival Donald Trump.

"It goes without saying," Sanders said, "that all of us together have got to do everything we can to elect Hillary Clinton president. But what is equally important is that on November 9th, the day after Hillary is elected president, we continue our efforts because we know what real change is about, what real politics is about, is transforming this country."

Both progressive firebrands touted "the most progressive party platform in the history of the United States of America," which they credited to the millions of voters who supported Sanders during the primary campaign. However, they said that the reforms called for the in the platform which will require defending.

Sanders said that if voters think that Wall Street, as well as the insurance, fossil fuel, and pharmaceutical industries, are going to "go peacefully into the night, you are mistaken."

He laid out the "two-fold struggle" for progressive voters. First, he said, Clinton needs to win by "landslide proportions so there is no doubt in anybody's mind that this country is going to reject that sexism, that racism, the xenophobia of the Trump campaign."