DotComp: Weighing the impact of Derrick Harmon's entry into the portal for Michigan State and its fans

Michigan State's Derrick Harmon was expected to be a team standout at defensive tackle. He entered the transfer portal on Tuesday. Inside, Michigan State football writer Jim Comparoni analyzes the impact of Harmon's decision, what's next for Michigan State at the position, and does this mean Spartan football is an NIL have-not?