PBS News Hour S41 E21 January 29, 2016

Friday on the NewsHour, days before the Iowa caucus, Democratic candidates fight for Iowa women voters. Also: Sen. Ted Cruz plays defense in the latest GOP debate, Brooks and Dionne talk the week in politics, Barbie gets a makeover, prescription drug shortages force doctors to make tough decisions, a Danish dance troupe stands up for refugees and a female JROTC officer takes command.