Clinton's Attacks on Sanders Draw Fire From Some Progressive Groups

Clinton's most recent attacks on Sanders center on his health care plan.

In recent days, Clinton and her campaign has increased the tempo of their attacks against the Vermont Senator, drawing criticism from progressives.

“The goal of Democrats holding on to the White House in 2016 is being made more difficult every second the Clinton campaign continues to distort the facts on Bernie Sanders's strong record against gun violence and attack a core progressive idea like universal healthcare,” Chamberlain wrote in a statement.

ABC News' Liz Kreutz contributed reporting.