Nikki Haley is challenging her former boss for the Republican presidential nomination. Haley doesn't mention Donald Trump in her announcement video, but she does admit that Republicans repeatedly lost the popular vote. How can she do better? Yale researchers accuse Russia of a potential war crime. Moscow says it's part of a humanitarian program. So, why does Russia take thousands of children out of Ukraine? And Michigan lawmakers consider new gun control legislation in response to the deadly mass shooting at Michigan State University.
