Nearly half of people who made New Year’s resolutions reportedly want to lose weight or get in shape, and U.S. News & World Report ranks Weight Watchers as the best diet to do that. It works by assigning points to food and restricting members to a certain number of points to eat per day. Last month, the company introduced Freestyle, a program featuring more than 200 foods that count for zero points. Weight Watchers president and CEO Mindy Grossman joins “CBS This Morning” to discuss a sustainable and holistic approach to better health. Source

South Korea says it made contact with North Korea overnight on a newly reopened communication channel. The hotline in Korea’s demilitarized zone was restored for the first time in nearly two years. Ben Tracy reports on how the move could put the U.S. and South Korea at odds. Source

Slick roads could make for a dangerous commute across the South. Sub-freezing temperatures froze fountains from South Carolina to Texas. Forecasters predict a coastal storm will bring one to three inches of snow from North Carolina to Georgia on Wednesday. Manuel Bojorquez reports. Source

The record-breaking cold wave is intensifying across much of the country. At least 13 deaths from the Midwest to the Northeast are blamed on the frigid temperatures, as more than two-thirds of the country faces temperatures below 20 degrees today. DeMarco Morgan reports. Source

President Trump: I have a “much bigger” nuclear button than Kim Jong Un; Will President Trump restore sanctions on Iran? Source

Unrest spreads as President Trump slams regime; Fans donate to Andy Dalton’s charity Source

Washington Post book critic Ron Charles checks out some of the latest titles to recommend, including Brandi Carlile’s memoir, “Broken Horses.” Source

Recommendations of new fiction, non-fiction and audio titles. Source

Time’s Up, a new initiative led by some of Hollywood’s most powerful women, is vowing to fight what it calls “systemic inequality and injustice in the workplace” — from Hollywood to blue-collar industries. A legal defense fund will help less-privileged women protect themselves from sexual misconduct. CBS News contributor and New York Times reporter Jodi Kantor joins “CBS This Morning” to discuss how the group formed and what they hope to accomplish. Source

An alternative to a potentially deadly chemical found in common paint strippers faces hurdles to reach consumers. Dozens of people who used methylene chloride died. Last month, the EPA indefinitely postponed a ban on that chemical, proposed by the Obama administration. Anna Werner spoke to researchers who developed what they call a less-harmful product. Source