Eye on Congress:The Big Story

This week's Democratic presidential debate in Iowa was the last chance for the significantly winnowed field to make a big impression -- not just before the Feb. 3 caucuses but also before the Senate impeachment trial of President Donald Trump. Herb Jackson and Jason Dick break down the biggest takeaways as candidates tried to get in one last look, and what voters can expect as the trial drags on. Learn more about your ad choices. Visit megaphone.fm/adchoices