Story highlights Sanders started receiving Secret Service protection in February

He maintained his protection even after the Democratic primary process ended on June 14

(CNN) Sen. Bernie Sanders is no longer receiving Secret Service protection, a source said Tuesday.

Sanders returned to Washington after his endorsement of Hillary Clinton earlier in Portsmouth, New Hampshire. The protection was dropped on arrival in Washington, according to a source familiar with the senator's schedule.

Sanders started receiving Secret Service protection in February, between the Iowa caucuses and the New Hampshire primary, as his candidacy soared and his crowds swelled. He had several close calls with protesters along the way, where his agents rushed in to protect him from potential harm.

He maintained his protection even after the Democratic primary process ended on June 14, drawing some questions from his fellow senators as he returned to his day job on Capitol Hill.

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