"You can see what's happening across the country in popular affinity to candidates who've been talking about this," she said, referring to Mr. Sanders and Republican front-runner Donald Trump. "I credit those candidates who are taking it into the fight for the presidency. It belongs there. It's that kind of major fight. I think that all the candidates should state their position. My heart will be with the candidate who supports reform of our trade laws so they create jobs in this country again."