The 2020 Iowa Democratic caucuses are just over a week away. How is impeachment affecting the presidential campaigns? What are some poll numbers you should be paying attention to? All that and more on this episode of "Where Did You Get This Number?" with Anthony Salvanto! With CBS News...

Figuring out how the Iowa Caucus system works has never been easy, but with new rules in place this year to help Iowans outside the state participate in these first-in-the-nation Caucuses, it's more complicated than ever. Anthony Salvanto works with CBS News Reporter Adam Brewster (@adam_brew) to...