"The Constitution, the Second Amendment was never absolute," Biden said to reporters.

The president spoke to reporters about gun control as he returned to Washington, DC, from Delaware for Memorial Day ceremonies.

Biden falsely claimed again that Americans were unable to purchase a cannon when the Second Amendment was passed, despite being repeatedly fact-checked as false by even the Washington Post and Politifact.

"You couldn't buy a cannon when the Second Amendment was passed and you couldn't go out and purchase a lot of weapons," he said.

Biden recalled a briefing he had when he was a senator on bullet calibers and the damage they caused to the human body.

"The 22 caliber bullet will lodge in the lungs and we can get it out," Biden said. "A 9 mm bullet blows the lung out of the body."

"The idea of a high caliber weapon, there is no rationale for it in terms of self-protection, hunting," he said.

Biden also referred to a quote from Thomas Jefferson who said "the tree of liberty must be refreshed from time to time with the blood of patriots and tyrants," tying it in with his argument about the Second Amendment.