Barbara Mikulski, Maryland’s longest-tenured United States senator, joined Johns Hopkins University in January 2017 as a professor of public policy and advisor to President Ronald J. Daniels. Mikulski retired from the Senate after completing her fifth six-year term. As a senator, Mikulski focused on issues including civil rights, national security, space exploration, education, jobs, research and innovation, women’s health, cybersecurity, senior citizens, and veterans. She was the primary sponsor of the Lilly Ledbetter Fair Pay Act, addressing salary discrimination against women. Obama later awarded Mikulski the Presidential Medal of Freedom.