Aiden Jaquez has spent the last four and a half years running a half marathon in all 50 states. It’s a big accomplishment for anyone — but he hasn’t even turned 12 yet. Source

Senator Kamala Harris is taking her presidential campaign on a whirlwind tour of Iowa. The California Democrat hosted four campaign events throughout the state on Tuesday, but recent polling shows support for her campaign plummeting among likely Iowa caucusgoers. 2020 campaign reporter Tim Perry joins CBSN with the latest from Iowa City. Source

In a tweet Tuesday, President Trump compared the impeachment inquiry to a “lynching.” That characterization drew condemnation from Democratic lawmakers, as well as some Republicans. CBSN political contributor and Democratic strategist Antjuan Seawright and Republican strategist Joseph Pinion join CBSN’s “Red and Blue” to discuss the response. Source

The son of convicted drug lord Joaquín “El Chapo” Guzmán has been captured and released by authorities in Mexico. CBS News correspondent Errol Barnett sits down with Mexico’s former foreign minister Jorge Castañeda to discuss the operation. Source

Aiden Jaquez ran his first half marathon at 6 years old. Now, he’s run one in all 50 states Source

As the U.S. watched from the sidelines, Russia’s Vladimir Putin emerged as the key power player in Syria, reaching an agreement for a new ceasefire with the president of Turkey. That will give Russia time to oversee the removal of Kurdish militias. Holly Williams reports. Source

Top diplomat in Ukraine gives “damning” testimony; Officers line up for hero K-9 recovering from shooting. Source

“We found the remains of a child that we believe to be Kamille,” said police chief Patrick Smith Source

A mother in Colorado who asked for donations to cover medical treatments for her dying daughter is now charged with murdering her child. The investigation started after she brought another daughter to a hospital claiming she was ill. Barry Petersen reports. Source

Major League Baseball on Tuesday announced it will launch an investigation into comments made by Houston Astros Assistant General Manager Brandon Taubman over “inappropriate language” he used when shouting at female reporters at the club house. CBS Sports MLB writer Katherine Acquavella joins CBSN’s Tanya Rivero for a closer look. Source