Which Republican candidate had the best performance at the fourth primary debate? Opportunity Lives Senior Writer Carrie Sheffield joins CBSN with analysis. Source

Grammy-winning country singer Tim McGraw has sold more than 40 million records worldwide, with 36 number-one singles. McGraw’s current single, “Top of the World,” already hit the top 10 on the radio charts. He joins “CBS This Morning” to discuss his new album. Source

Growing up in Virginia, Morgan Wade started her first band in college—putting it together through an ad on Craigslist. Her live sets caught record producers’ attention, leading to her debut album “Reckless” and songs that showed up on prominent playlists on Spotify and Apple Music, garnering over a million streams. Wade joins “CBS This Morning: Saturday” to perform her song “Wilder Days.” Source

T-Mobile says it will roll out free unlimited data streaming offers for its customers. CNET associate editor Dan Graziano spoke to CBSN about what this mean for the wireless market. Source

Author Lewis Carroll wrote the original “Alice’s Adventures in Wonderland” 150 years ago, and it has been sending readers down the rabbit hole ever since, as Anthony Mason reports. Source

Rapper Waka Flocka shows off his weather forecasting chops at CBS affiliate WLTX. Source

After gossip columns reported Bündchen was spotted in a burka outside a plastic surgeon’s office, the famous model tells “CBS This Morning” co-host Charlie Rose how she deals with the paparazzi that feeds “a system and a media that doesn’t have to fact check” Source

SeaWorld says it will phase out its San Diego Shamu show in 2016. San Diego Union-Tribune business reporter Lori Weisberg spoke to CBSN about the change in policy. Source

After one student spent more than a week on a hunger strike and the football team threatened to sit out their next game, University of Missouri president Tim Wolfe resigned Monday amid outcry that he had not done enough to combat racist incidents that have taken place at the school; a new report released Monday showed that people who had taken medication to lower their blood pressure were living longer lives, but how low is too low? Source

A new report released Monday showed that people who had taken medication to lower their blood pressure were living longer lives, but how low is too low? Dr. Jon LaPook has more on that. Source