Warren refuses to disavow new super PAC

Reality check: Warren has spoken adamantly against the influence of unlimited spending and dark money in politics. But the newly launched Persist has emerged to support the senator following her underwhelming performances in Iowa and New Hampshire.

• The Warren campaign told Axios earlier this week: "Senator Warren’s position hasn’t changed. Since day one of this campaign, she has made clear that she thinks all of the candidates should lock arms together and say we don’t want super PACS and billionaires to be deciding our Democratic nominee."
• The campaign also told Politico last November: "Elizabeth Warren believes democracy is undermined by anonymous, dark-money attempts to influence voters — whether that influence is meant to help or hurt her candidacy."

Go deeper: Warren becomes fastest first-time presidential candidate to hit 3 million donations