She cited The Brennan Center for Justice which includes,


“A fraud on the American public.” That’s how former Chief Justice Warren Burger described the idea that the Second Amendment gives an unfettered individual right to a gun. When he spoke these words to PBS in 1990, the rock-ribbed conservative appointed by Richard Nixon was expressing the longtime consensus of historians and judges across the political spectrum.”

https://www.brennancenter.org/our-wo...cond-amendment

Richardson always cites her sources.