Bernie Sanders has been harshly critical of Joe Biden over his vote to authorize the use of force in Iraq.
On Wednesday night, Biden said Sanders should be held to similar account for his own votes against the Brady Bill and support for legislation that shields gun manufacturers from lawsuits.
Both men have since admitted they regretted their votes.
“The idea here is,” Biden said, “what is the thing that motivates you to make your judgments?”
Sanders has “gone after every corporation in the world, which is -- I don't disagree on all of it with him, but I've not seen him go after the gun manufacturers,” Biden said. “And so here's the deal. What are you going to do about it now?”
Sanders is currently backs a bill that would reverse the current law and open up the firearm industry to lawsuits.
Biden also accused Sanders of glossing over his record on the question of an assault weapons ban, saying that Sanders backed it in 1988, when he ran for and lost his first House race, then backed off the position when he won two years later.
Sanders supported the assault weapons ban, but enjoyed some NRA support in 1990 because of his opposition to the handgun bill.
Hear Former VP Biden's comments: