
Douglas Hallward-Driemeier, a partner at Ropes & Gray LLP in Washington, will argue that states should recognize marriages performed in other states.

Joseph Whalen, Tennessee's associate solicitor general, will argue that states shouldn't have to recognize marriages performed in other states.

Mary Bonauto, GLAD's civil rights project director, will argue that states shouldn't be able to ban same-sex marriages.

John Bursch, Michigan's former solicitor general, will argue that states have the authority to regulate marriages.