Democratic presidential candidate Bernie SandersBernie SandersMajority of Democrats want third term for Obama Cutting corners in a federal campaign is criminal Sanders is only helping Trump by staying in the race 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.
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.