On the heels of a crushing defeat in California, Vermont Sen. Bernie Sanders shuttered his Oakland campaign office.

Sanders had campaigned in Oakland and other Bay Area cities doggedly ahead of the California primary, which he lost by 13 points to presumptive Democratic nominee Hillary Clinton on Tuesday.

His supporters have vowed to keep on fighting for the "political revolution" that the senator started. They are now focused on ensuring that his issues make it into the democratic platform at the Philadelphia convention in July.

Joy Newhart, a Sanders supporter, said she would continue to support the senator and doubted that his campaign's momentum would die out any time soon.

"Now, it's moving to see what kind of message the Democratic National Committee heard from what Bernie was making obvious," she said. "This is a political revolution and it's not stopping."

After meeting with President Barack Obama on Thursday, Sanders said he would "of course" be sticking it out in the race until the Washington D.C. primary held next Tuesday, and hinted that a collaboration with Clinton was in the offing.

"I look forward to meeting with her in the near future to see how we can work together to defeat Donald Trump and create a government that represents all of us," the senator said.

Obama endorsed Clinton shortly after his meeting with Sanders.

Meanwhile, the senator's supporters are reconciling themselves to the primary loss and are looking ahead to the future.

"I think you have a small cross section of people who will choose not to vote as a political standing, but I think the majority will turn over and vote for Hillary because a Trump presidency is a horrific reality," said Sanders supporter Katherine Duckworth.

13:16 Cleaning up packing up making sure the landlord still likes us"

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Bernie Sanders volunteers are closing up shop....preparing to shut down Sanders Oakland campaign office as the race winds down...

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(1:40) I will of course be competing in the DC primary held next Tuesday.

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Today Sanders vowed to stay in the race through early next week....but after meeting with President Obama who endorsed Hillary Clinton today, Sanders also hinted he too may soon join the Clinton camp.

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(2:31) I look forward to meeting with her in the near future to see how we can work together to defeat Donald Trunp and create a government that represents all of us.

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(4:46) it hasn't really sunk in yet

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Sanders supporters....who helped rally huge crowds in the Bay Area over the past several weeks, say they're doing a lot of soul searching right now as they figure out where to go from here....

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(3:38) I think you have a small cross section of people who will choose not to vote as a political standing but I think the majority will turn over and vote for Hillary because a Trump presidency is a horrific reality.

(13:23) now it's moving to see what kind of message the Democratic National Committe heard from what Bernie was making obvious.

(2:00) this is a political revolution and it's not stopping. ]]