A week from tonight, Iowa Democrats plan to gather in high school gymnasiums, public libraries, church basements and other locales to make the first concrete decisions of the 2020 presidential election. Source

Rachel Stassen-Berger from the Des Moines Register joined CBSN’s “Red and Blue” to discuss why many Iowa Democrats are still deciding which candidate to support for the presidential nomination just a week before the state’s first-in-the-nation caucuses. Source

In northern Alabama, a search is underway for victims of a devastating fire that destroyed dozens of boats. It happened at a marina where many live on house boats. Courtney Zubowski reports. Source

In an interview with “CBS Evening News” anchor Norah O’Donnell, a group of impeachment defense surrogates questioned a report that found President Trump wanted to withhold military aid to Ukraine until officials there looked into his political rivals. O’Donnell spoke to Representatives Mark Meadows, Doug Collins, Elise Stefanik and Debbie Lesko. Source

Here’s a look at the top stories making headlines on the “CBS Evening News with Norah O’Donnell.” Source

Norah O’Donnell spoke to Representatives Meadows, Collins, Lesko and Stefanik. Source

An explosive claim from President Trump’s former national security advisor has blindsided Senate Republicans. It’s also thrown the president’s hope for a quick end to his impeachment trial into doubt. Nancy Cordes has the latest. Source

In an interview with “CBS Evening News” anchor Norah O’Donnell, Representative Mark Meadows addressed whether he would support the White House blocking testimony from John Bolton. He said he believes “executive privilege” should be “invoked.” Source

NBA’s flagship store in New York told customers Monday that his Los Angeles Lakers jerseys are sold out. Source

The latest batch of Starlink internet relay satellites will push SpaceX’s total to 240 orbiting relay stations. Source