Sen. Elizabeth Warren said Sunday that she approves of President Trump's move to bring tariffs into the trade conversation. "What I'd like to see us do is rethink all of our trade policy. And, I have to say, when President Trump says he's putting tariffs on the table, I think tariffs are one part of reworking our trade policy overall," she told CNN's Jim Acosta on State of the Union.

Why it matters: Warren is one of Trump's most vocal opposers, but as Democrats near the 2018 midterms, the party must appeal to the blue collar workers who voted for the president — some of whom support his tariffs — if they want to win back the House. It's also a reminder that Trump is closer to the left wing of the Democratic Party on trade than he is to mainstream Republicans like Paul Ryan.