With less than a month until the end of the presidential primaries and caucuses, Donald Trump appears confident he'll pick up the Republican nomination. Despite Hillary Clinton’s commanding lead in pledged and unpledged delegates, Sen. Bernie Sanders pushes on.

White House hopefuls are getting their first test with voters tonight in Iowa, where caucusing is in full swing. Joining us from Des Moines, Iowa to talk about that and more is "Chicago Tonight's" Carol Marin.

Carol Marin

It's the final countdown for GOP presidential hopefuls in Iowa. Mitt Romney, Ron Paul and Rick Santorum lead the pack. Who is likely to win? And whose presidential dreams are over? We talk with Carol Marin who joins us live from Des Moines, Iowa.