Sen. Chuck Grassley, the second oldest member of the Senate, may be your next fitness inspiration. “So he and I are going to do 22 pushups,” Grassley said, pointing to Cotton, a 44-year-old retired Army captain. A Politico profile on Grassley published in May, which focused on his political future and his indecision on seeking another term 2022, revealed that the Iowa senator wakes at 4 a.m. each day, often going for a two-mile run.