Isabel Song was steadily monitoring the results of the New Hampshire Democratic primary on her iPad. Nearby, other campaign volunteers with UC Berkeley Students for Bernie used their cellphones to reach out to voters in Nevada to drum up support for their man Bernie Sanders in that state’s upcoming Feb. 20 Democratic caucus.

The small but committed group had gathered early Tuesday evening at Lothlorien, a funky vegetarian student co-op at Berkeley, to work the phones and watch the live-streaming of the Democratic primary results from New Hampshire.

The students displayed little emotion as they watched Hillary Clinton concede her loss. The lopsided results were just as they’d expected. “She looks like she’s seen a devil,” said one. “She said she loves New Hampshire and still loves New Hampshire,” said another. “Sad.”

Meet the much-talked-about millennials who are the thorn in Clinton’s side. The Berkeley students are at the forefront of grass-roots movements of young voters on college campuses that have powered the Vermont senator’s long-shot campaign. Young voters, especially women, helped Sanders to a rout in New Hampshire. He got 60 percent to Clinton’s 38 percent.

Berkeley has the biggest college chapter of students in the country working on Sanders’ campaign. What sophomore Rigel Robinson started last semester as a Facebook group has grown from 15 members to nearly 200.

“Once we got into the roll of things and started doing productive things for the campaign it really took off,” Robinson said.

That has included manning campaign tables and holding weekly phone banks to pull in voters.

Now the chapter is gearing up for its biggest campaign event yet.

More than 30 students will travel to Reno Friday — half in cars and half on Greyhound. They’ll spend the long weekend knocking on doors for the Sanders campaign to build voter support in advance of the Nevada caucus.

I spent a couple of hours with the Berkeley volunteers Tuesday. The operation was impressive.

Callers patiently ran through the script provided by the campaign: “Hi, I’m Skylar, I’m Hannah, I’m Noah. Can I interest you in the campaign of someone who is not funded by big money?”

The volunteers were undaunted by hang-ups or people shouting, “Trump for president.” Each time a student connected with a Sanders supporter, he or she would ring a bell. As the evening wore on, the bell-ringing intensified, building excitement.

UC Berkeley senior Michael Roe calls himself a pragmatist. He says he realizes there are many obstacles to Sanders’ policy proposals.

“But he is acting as an epicenter to shift the debate to issues like income inequality, climate change and public education that effect our generation,” Roe said. “And that has a huge impact.”

Song is one of the freshmen who has taken a leadership role in the group. She was a Clinton supporter until the summer. But then, she said, she began reading both candidates’ websites and comparing their positions.

Song says she switched her allegiance to Sanders because he opposed the Keystone Pipeline and supports free public college tuition “through a tax on Wall Street speculation.”

“He is very passionate and makes me feel like he will do everything he can to fight for people like me, young college students and millennials who are in the middle class or low-income and really need help,” Song said.

Her allegiance to Sanders was further solidified by controversial comments from some older female Clinton supporters suggesting that young women should fall in line and support her because she’s a woman.

Feminist icon Gloria Steinem’s comment in particular angered young female Democrats when she told Bill Maher that they were backing Sanders just so they could meet young men.

“Her supporters often attack young feminists,” Song said. “It reminds me of the fact that the mostly white feminist movement is painfully showing its age and irrelevancy during this election.” Ouch.

There is clearly a big generational divide between Sanders and Clinton supporters. It should be a real concern for the Clinton campaign that she has failed to connect with younger voters.

And by taking pot shots at young women Democrats, older Clinton supporters will only drive them further out of the fold.

Tammerlin Drummond is a columnist for the Bay Area News Group. Her column runs Thursday and Sunday. Contact her at tdrummond@bayareanewsgroup.com, or follow her at Twitter.com/tammerlin.