A spokesman for Bernie Sanders Bernie SandersKenosha will be a good bellwether in 2020 Biden's fiscal program: What is the likely market impact? McConnell accuses Democrats of sowing division by 'downplaying progress' on election security MORE retorted with a photo after Hillary Clinton Hillary Diane Rodham ClintonWhat Senate Republicans have said about election-year Supreme Court vacancies Bipartisan praise pours in after Ginsburg's death Trump carries on with rally, unaware of Ginsburg's death MORE said Saturday she didn't know where Sanders was during the healthcare fight in the 1990s.

"I don't know where he was when I was trying to get healthcare in '93 and '94," Clinton said, according to New York Times reporter Amy Chozick.

"I don't know where he was when I was trying to get health care in '93 and '94," a fired up @HillaryClinton says of Sanders. — Amy Chozick (@amychozick) March 12, 2016

"Literally standing right behind her," Mike Casca tweeted with a photo of Clinton and Sanders during a speech on healthcare.

Others shared an image of a note from Clinton to Sanders thanking him for his "commitment to real health care."