A 2012 law tried to limit lawmakers' ability to make money on Wall Street. It hasn’t worked.This episode was produced by Hady Mawajdeh, edited by Matt Collette, engineered by Efim Shapiro and Paul Mounsey, fact-checked by Laura Bullard and Victoria Dominguez, and hosted by Noel King.Transcript at vox.com/todayexplainedSupport Today, Explained by making a financial contribution to Vox! bit.ly/givepodcastsLearn more about your ad choices. Visit podcastchoices.com/adchoices