Joanne LaMarca Mathisen, the spirited executive producer behind the fourth hour of NBC’s Today morning franchise, plans to step down from the role later in August. In a memo issued to staffers on Thursday, Libby Leist, an SVP at NBC News who oversees Today, said LaMarca was eager to spend more time with family, and had initially taken the job in 2019 with the intention to stay for a year.
