One of the biggest clashes of the night was between former Vice President Joe Biden and former HUD Secretary Julian Castro, who served in former President Barack Obama's administration together.
Castro argued that while his plan would automatically enroll people who didn't have private insurance into a public option when they lost their jobs, for example, Biden's would require people to actively enroll.
"The difference between what I support and what you support is that you require them to opt-in, and I do not require them to opt in," Castro said. "Barack Obama's vision was not to leave 10 million people uncovered, he wanted every single person in this country to be covered."
Biden argued that people would not have to buy in to Medicare under his plan, but Castro pushed back, saying, "You just said two minutes ago that people would have to buy in — are you forgetting already what you said two minutes ago?" We need a system that automatically enrolls people no matter what," Castro said.
I'm fulfilling the legacy of Barack Obama and you're not," Castro told Biden, to which Biden shot back, "That'll be a surprise to him."
On the issue of immigration, Castro further accused Biden of constantly name-dropping Obama while shying away from the more controversial parts of Obama's record on immigration.