"We’ve got to see the White House move more aggressively on healthcare, on housing, on tax reform, on the high cost of prescription drugs,” Sanders said. “If we can get the president to move in that direction, he will win; if not, he’s going to lose.”

The US senator from Vermont added that he was in contact with the White House pressing that point. “We hope to make clear to the president and his team that they are not going to win this election unless they come up with a progressive agenda that speaks to the needs of the working class of this country.”