Top adviser on Sanders: 'He's always been underestimated'

A senior adviser to Sen. Bernie SandersBernie SandersBiden lead shrinks, Sanders and Warren close gap: poll Biden allies: Warren is taking a bite out of his electability argument Overnight Health Care — Presented by Partnership for America's Health Care Future — Pelosi set to unveil drug price plan | Abortion rate in US hits lowest level since Roe v. Wade | Dems threaten to subpoena Juul MORE’s 2020 presidential campaign said during an interview aired on Wednesday that the Vermont independent has “always been underestimated.”

“He is very, very focused — his work is his life,” Jeff Weaver told Hill.TV, referring to Sanders. “There is nothing else other than his kids and his grandkids, there is nothing else.”

“He has a mission which is to help working people in marginalized communities and that’s what he’s worked on his whole life,” he added.

Weaver’s comments come after recent polling suggesting that Sanders could be underestimated in the crowded Democratic field.

Most national polls show Sanders consistently polling among the race’s top tier candidates along with former Vice President Joe BidenJoe BidenBiden lead shrinks, Sanders and Warren close gap: poll Biden allies: Warren is taking a bite out of his electability argument Budowsky: Donald, Boris, Bibi — The right in retreat MORE and Sen. Elizabeth WarrenElizabeth Ann WarrenBiden lead shrinks, Sanders and Warren close gap: poll Defense bill talks set to start amid wall fight Biden allies: Warren is taking a bite out of his electability argument MORE (D-Mass.).

Even though Biden has maintained his lead as the clear frontrunner, some polls suggest that Sanders, who also boasts a strong grass-roots fundraising base, could be gaining some ground in key battleground states like Colorado.

According to an Emerson poll released on Tuesday, Sanders tops the field with 26 support among likely Democratic primary voters in Colorado, with Biden trailing at 25 percent.

Warren came in a close third, receiving 20 percent support in the survey. Sen. Kamala HarrisKamala Devi HarrisBiden lead shrinks, Sanders and Warren close gap: poll Defense bill talks set to start amid wall fight Media and candidates should be ashamed that they don't talk about obesity MORE (D-Calif.) followed with 13 percent support, and South Bend, Ind. Mayor Pete ButtigiegPeter (Pete) Paul ButtigiegBiden lead shrinks, Sanders and Warren close gap: poll Poll: Biden leads Democratic field by 10 points in Florida CNN announces details for LGBTQ town hall MORE rounded out the top five candidates with 5 percent support.

However, polls remain volatile and have also shown Sanders slipping in other key swing states like Iowa.

A Monmouth University released earlier this month showed Sanders dropping into fourth place in the Hawkeye State behind Warren and Biden.

Several candidates, including Sanders, have sought to highlight their incremental gains or question surveys that show them losing support.

Pollsters and experts, meanwhile, have cautioned against reading too much into primary polls.

“It’s August of 2019, the horse race polls are absolutely worthless,” Democratic pollster Chris Kofinis told The Hill. 

—Tess Bonn