Sanders raises $4 million since weekend wins
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Democratic presidential candidate Bernie SandersBernard (Bernie) SandersFive takeaways from Cruz, O'Rourke's fiery first debate Ben & Jerry’s co-founders announce effort to help 7 Dem House challengers Dems look to Gillum, Abrams for pathway to victory in tough states MORE's campaign has raised nearly $4 million since its weekend victories, the campaign told reporters Monday during a call.

Sanders won elections on Saturday in Washington, Hawaii and Alaska.

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"Reports of our death are extremely exaggerated," Campaign Manager Jeff Weaver said during the call Monday. "Our grassroots funding has been tremendously strong."

Sanders won all three states by a large margin. In the Washington caucuses, Sanders took 72.7 percent to Clinton's 27.1 percent. In Alaska's caucuses, he beat Clinton 81.6 to 18.4 percent. In Hawaii, Sanders won with 69.8 percent of the vote.

On Monday, a top Sanders aide said the Democratic race will hinge on superdelegates.