On June the 7th, 475 delegates are up for grabs in California for Sanders and Clinton.

"Bernie Sanders should stay in this race".

Leading Democrats are growing increasingly vocal in their concerns about the White House hopeful's continued candidacy, and if he and his legions of enthusiastic supporters ultimately will unite behind Hillary Clinton in a general election against Donald Trump.

Trump, who has all but secured his party's nomination, has turned his focus to November, outlining to Reuters on Tuesday proposals including scrapping financial regulation and the Paris climate accords.

"Hillary Clinton's seemingly pathological need to mislead voters, her reckless conduct as secretary of state now under FBI investigation, and cronyism at her family foundation have alienated large swathes of voters, including many in her own party", Priebus added.

Sanders released a statement Tuesday saying he is unequivocally against any acts of violence committed by his supporters.

The politician had said he condemned violence and harassment against individuals but framed Nevada's incident as a warning to Democratic leaders to treat his supporters with fairness.

"If you lose a game that you put your heart and soul into, and you lose squarely, you can walk off the court and shake someone's hand and say, 'Well done, '" said Congresswoman Diane Russell, a ME legislator and Sanders supporter. "Now we will see, but in my mind when he says he does not support any type of violence, I believe him".

"Most journalists I've talked to have said this on the air, 'Bernie probably won that, ' but we'll never know because the Democratic party rigged it". Debbie Stabenow of MI said.

"It worries me a great deal", Feinstein told CNN's Manu Raju. "I'm getting to like the West Coast", Sanders declared.

Sanders' success in later primaries has historical precedent, according to analyst William Galston at the Brookings Institution in Washington. Sanders won OR, a state that played to his strengths. And his ability to energize progressives and draw huge crowds has contrasted with Clinton's plodding air of inevitability that has excited few people on her march to the Democratic nomination. Clinton has been more workmanlike in piling up delegates, even if her supporters note that she generated enough energy to swamp Sanders in major states like NY.

"It is absurd that you had 400 establishment Democrats on board Hillary Clinton's campaign before anybody was in the race", Sanders told MSNBC's Rachel Maddow in an interview last week. Now they want to be sure he'll transfer that energy to Clinton's campaign.

"We'll get it all together in July", Feingold said. In his statements since then, Sanders has made no attempt to heal it.

Senior U.S. Senator Harry Reid of Nevada and Wasserman Schultz on Tuesdsay both also called on Sanders to do more to rein in his supporters. "And I would say that the principal responsibility for bringing his supporters on board rests with him, not her".