The Los Angeles Times reports the lawmakers shouted "Timeline!" That would be a direct rebuke of President Barack Obama, who's made the trade deal a centerpiece of his Asia strategy. Bernie Sanders, I-Vt, stand together before the start of the Univision, Washington Post Democratic presidential debate at Miami-Dade College, Wednesday, March 9, 2016, in Miami, Fla.
"My message was a simple message: We have got to fight for the needs of the middle class and working families of this country", he said. "I want to see it more progressive".
The interviewer pressed the Democrat as to whether there might be an endorsement of Ms Clinton.
"She has a life history of standing up to powerful special interests".
Although some recent polls show double-digit leads for Hillary Clinton over Donald Trump, in the RealClearPolitics poll average Trump trails Clinton by about five percentage points.
The visit to the crucial presidential battleground state will be the first for Clinton since the Granite State's first-in-the-nation primary on February 9.
Up till now, Hillary Clinton has dismissed Bernie Sanders' plan for tuition-free college as expensive and unnecessary, going as far to quip that she doesn't "think taxpayers should be paying to send Donald Trump's kids to college".
The two camps have been in ongoing discussions about the role Sanders will play and about the party platform ahead of the Democratic National Convention later this month.
Sanders was wildly popular with young voters during the Democratic primary, with many drawn to his calls for free tuition at all public colleges and universities.
Sanders indicated he would discourage his supporters from voting for a third-party candidate, be it Jill Stein of the Green Party or Libertarian Gary Johnson.