With Bernie Sander's large victory over Hillary Clinton, he's signaled he'll be a headache for Clinton and the party elites, for a while, even if he ultimately fails to get the nomination. We'll know after Super Tuesday, in less than a month, if he has the ability to win a big state like Texas.
Bernie's will likely have a lasting influence in the party, however, largely because his views are thoroughly mainstream, in spite of efforts to label him as some sort of extremist. As Lew Rockwell writes:"He is an unapologetic Keynesian redistributionist and state expander, no different in substance from FDR, LBJ, Nixon, George W. Bush, Obama, and the rest of that evil crew. He’s as American as apple pie."
For more on Bernie and his policies, see Bill Anderson's article "The Economics of Bernie Sanders," and these articles:
"Sanders and His Followers Are Not Outliers" by Jeff Deist
"Bernie Sanders Is Right: The US Is Already a Socialist Country" by Ryan McMaken
These articles respond to claims made by Sanders:
"The Poor in the US Are Richer than the Middle Class in Much of Europe" by Ryan McMaken
"Bernie Sanders Says We Should be Spending Less on Health Care" by Ryan McMaken