Vice President Biden gave an impassioned plea for Congress to double down on new gun-control measures, including an assault weapons ban, by suggesting the laws could have prevented some of the deaths in Newtown, Mass.

"For all those who say we shouldn't and can't ban assault weapons," Biden said, also mentioning limiting the capacity of ammunition magazines. "How can they say that? Take a look at those 20 beautiful babies."

Biden, who met Thursday in New York with Mayor Michael Bloomberg and Newtown families, said that if the gun-control measures would have saved just one life in Newtown, it would have been worth it.

Biden also suggested that Adam Lanza might have been killed sooner had he had to spend more time reloading.

"Think about Newtown," Biden said. "Think about how many of these children or teachers may be alive today had he had to reload three times as many times as he did."

The assault weapons ban will not be part of the gun-control package that will be voted on in Congress and appears to be all but off the table at this point. But Biden and White House chief of staff Denis McDonough have both kept pushing for the ban.