"Bernie or Bust people, you're ridiculous," comedian Sarah Silverman, a Bernie Sanders supporter herself, said from the stage at the Democratic National Convention on Monday.

Her point: you've won and you don't even know it.

The beginning of the convention in Philadelphia has been dominated by protests from die-hard supporters of Sanders, the democratic-socialist Vermont senator who vigorously challenged presumptive presidential nominee Hillary Clinton in the primaries but has now endorsed her.

Those Bernie or Bust people have paraded through the streets, seeking out the press' cameras and chanting "Hillary for Prison" and other slogans they picked up from watching a triumphant Donald Trump at the Republican convention last week.

Like Silverman, Paul Czisny is fed up with them.

"Unfortunately, all they're doing is aiding the Trump camp," the Wisconsin delegate and Sanders backer told Politico. "Virtually no one here is going to vote for Trump, but will (Sanders' supporters) stay home? Will they vote for Jill Stein? I find this maddening because we've seen this movie before, and if we think Bush was a disaster, Trump will be an even bigger disaster."

Czisny was referring, of course, to how Green Party candidate Ralph Nader may have tipped the 2000 presidential election to Republican George W. Bush. Stein is the Green Party's presidential candidate this year.

How much does this disharmony in the Democratic Party matter? Possibly quite a lot. Clinton arguably needs a significant "bounce" in the polls from the convention. She comfortably led throughout June, but she's had a terrible July (in large part thanks to the Democratic National Committee email hack) while Trump has soared. A raft of polls released Monday put the GOP nominee in the lead or tied with Clinton.

Statistician and fivethirtyeight.com founder Nate Silver's "now-cast," which predicts the outcome of the election if it were held right now rather than in November, says Trump at the moment would have a 57.5 percent likelihood of winning the Electoral College and thus the presidency.

Polling history suggests that, absent a major gaffe or disruptive event, the polls in late August will hold through the election. So Clinton needs to move up soon.

It certainly would help if Sanders' backers started coming over to her side. So Sanders, fellow progressive hero Massachusetts Sen. Elizabeth Warren and other Monday convention speakers tried to hammer home the argument that the 2016 Democratic Party platform is the most progressive its ever been.

"Tonight's convention confirmed that progressives have achieved a major victory in shifting the center of gravity in the Democratic Party," Kait Sweeney, press secretary for the Progressive Change Campaign Committee, said in a statement. "Elizabeth Warren, Bernie Sanders and others showed the nation tonight that Democrats are unifying around big, bold progressive issues. After years of hard work, the party's center of gravity has shifted to a bold, progressive agenda that includes debt-free college, expanding Social Security, $15 minimal wage, public option and Wall Street reform."

The Bernie or Bust crowd nevertheless refuses to accept the new narrative. Many of them, after all, are not Democrats but wannabe revolutionaries. They always were unlikely to vote in November.

Fivethirtyeight's Clare Malone argues there's no way for Clinton to make them happy, that the convention protests are essentially summer camp for them. She wrote: "Many just want to keep the sense of community built by the Sanders campaign going."

Will their community-building stifle Clinton's convention bounce in the polls? The Democrats have three more days to make sure that doesn't happen.

-- Douglas Perry