Is Bernie Sanders creating a left-wing tea party?

Josh Kraushaar of the National Journal has stepped up the criticism of Sen. Bernie Sanders, suggesting that he is essentially creating a tea party-style lefty insurgency within the Democratic Party.
Though the Vermont senator is performing surprisingly well in some Democratic primary polls and has drawn huge crowds in New Hampshire and Iowa, Kraushaar views Sanders as little more than a dangerous distraction in Hillary Clinton's march to the party's nomination.
He is not a pure liberal, he is “further left than that,” a candidate who believes he can lead a political revolution, according to the NJ columnist.

Here’s the Sanders candidacy, from the Kraushaar perspective:

“In the past, the notion of an unreconstructed socialist winning widespread support -- even as a protest candidate -- would have been fanciful within the Democratic Party. The closest recent parallel to Sanders is Dennis Kucinich, who tallied less than 4 percent of the total primary vote in 2004. Ralph Nader's high-water mark was in 2000, when his 2.7 percent third-party tally was nonetheless enough to spoil Al Gore's hopes for the presidency.

“… Like the tea-party stirrings among Republicans in 2009, the Sanders boomlet is a sign that liberal activists are getting restless, and looking for a fight.

“… The real threat that Sanders poses to Clinton (is) not as a candidate, but as a sign that the Democrats' version of the tea party is ascendant at the worst possible time. By nonideological standards, Sanders is a weak challenger -- he's got an unhealthy mix of Donald Trump's ego and Michele Bachmann's bombast. He's won statewide office in Vermont, the most liberal state in the country, with a population smaller than Bachmann's old congressional district.”