CBS News political correspondent Ed O’Keefe breaks down next steps for the key contenders ahead of the South Carolina primary elections. Source

CBS News Elections and Surveys Director Anthony Salvanto breaks down the latest polling post-Nevada caucuses and ahead of the South Carolina primary. Source

At his Florentine studio Charles Cecil teaches the “sight-size” method of portraiture developed during the Renaissance, a technique he thinks would otherwise die off. Correspondent Seth Doane talks to students who are keeping it very much alive. Source

The former vice president says “we should only have troops there to make sure that it’s impossible” ISIS to reestablish a foothold Source

At 91, Bob Moore is an unexpected celebrity in the natural and organic foods industry, as the face of the company he founded, Bob’s Red Mill. He talks with correspondent Luke Burbank about his recipe for success. Source

From the memorial service for Kobe and Gianna Bryant to National Girl Scout Cookie Weekend, “Sunday Morning” takes a look at some notable events of the week ahead Source

The former vice president discusses the road ahead to South Carolina and the integrity of the 2020 election. Source

The president’s national security adviser discusses Russian efforts in the 2020 election and security concerns for the democratic process. Source

Biden is ahead with black voters, but his support has receded since the fall, according to a new CBS News poll. Source

A major change is underway at the struggling lingerie retailer Victoria’s Secret. Jane Pauley reports. Source