Democratic presidential candidate Bernie SandersBernie SandersPerez and Ellison agree on DNC playing neutral role in primary Sanders, not Trump, is the real working-class hero Big Pharma must address high drug prices 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.