Sanders: Klobuchar and Buttigieg ended campaigns under 'great deal of pressure' from 'establishment'

Sen. Bernie SandersBernie SandersSchumer vows next steps after 'ridiculous,' 'awful' GOP election bill filibuster Schumer, Pelosi meeting with White House on infrastructure Feehery: 8 reasons why Biden should take the bipartisan infrastructure deal MORE (I-Vt.) said Sunday that the "establishment" placed "a great deal of pressure" on Sen. Amy KlobucharAmy KlobucharSchumer vows next steps after 'ridiculous,' 'awful' GOP election bill filibuster Senate GOP blocks voting rights bill The antitrust package is a Trojan horse conservatives must reject MORE (D-Minn.) and former South Bend, Ind., Mayor Pete ButtigiegPete ButtigiegHigh-speed rail getting last minute push in Congress Buttigieg: Bipartisan deal on infrastructure 'strongly preferred' OVERNIGHT ENERGY: Biden ends infrastructure talks with key Republican | Colonial Pipeline CEO grilled over ransomware attack | Texas gov signs bills to improve power grid after winter storm MORE to exit the presidential race and endorse former Vice President Joe BidenJoe BidenBaltimore police chief calls for more 'boots on the ground' to handle crime wave Biden to deliver remarks at Sen. John Warner's funeral Garland dismisses broad review of politicization of DOJ under Trump MORE.

“The establishment put a great deal of pressure on Pete Buttigieg, on Amy Klobuchar, who ran really aggressive campaigns. Well, I know both of them. They work really, really hard. But suddenly, right before Super Tuesday, they announced their withdrawal,” Sanders said on NBC’s “Meet the Press.”

“If they had not withdrawn from the race before Super Tuesday, which was kind of a surprise to a lot of people, I suspect we would have won in Minnesota, we would have won in Maine, we would have won in Massachusetts. The turnout may have been a little bit different,” he added.

Sanders also addressed Sen. Elizabeth WarrenElizabeth WarrenThe Hill's 12:30 Report - Presented by Facebook - Senate to vote on elections bill Supreme Court battle could wreak havoc with Biden's 2020 agenda Progressives fear nightmare scenario over voting rights assault MORE (D-Mass.) declining to make an endorsement after withdrawing from the race, with NBC’s Chuck ToddCharles (Chuck) David ToddChuck Todd reluctant to 'ban' election deniers from 'Meet the Press' Portman: Republicans are 'absolutely' committed to bipartisan infrastructure bill Sanders against infrastructure deal with more gas taxes, electric vehicle fees MORE asking him whether he could win the presidential nomination without her support.

“I would certainly love to have the support of Sen. Warren, but yes, of course we can. We can win this because we are going to win the support of working people all over this country who agree with our agenda that, among many other things, the time is long overdue to recognize that health care is a human right in this country, not a privilege. We must pass a 'Medicare for All' single-payer program,” Sanders said.

Sanders also addressed online attacks from his supporters, which Warren described in a recent interview. Sanders has repeatedly condemned such attacks.

“I will not deny for a second that we have some people who claim to be supporters, although I have a hard time understanding why they think they can support me and make vicious personal attacks against people. That's not what our campaign is about,” Sanders said.

The Vermont senator also addressed online harassment of black women affiliated with his campaign. 

"Talk to some of the African American women who are in my campaign about the racist and sexist crap that they have got to deal with," he told Todd. "So it's an ugly world out there."

Hilary Rosen, a surrogate for former Vice President Joe Biden, apologized last week after telling Sanders campaign co-chairwoman Nina Turner she did not have the "standing" to quote Martin Luther King Jr., and MSNBC contributor Jason Johnson was widely criticized in February for calling Sanders’s campaign staff the “island of misfit black girls.”