The Senate votes to pass the First Step Act, a criminal justice reform bill. Donald Trump tweets that he does not want a concrete border wall, but rather a see-through wall made of steel slats. Alexandria Ocasio-Cortez leads the House in percent of campaign funding from small donors. Trump orders the withdrawal of troops from Syria. Randy Shaw, author of ""Generation Priced Out,"" discusses the skyrocketing cost of urban housing. Elizabeth Warren has a plan that would allow the government to produce generic drugs. A newly discovered amphibian will be named after Donald Trump.