John Glover Roberts Jr. (born January 27, 1955) is an American jurist who has served since 2005 as the 17th chief justice of the United States. He has been described as having a moderate conservative judicial philosophy, though he is primarily an institutionalist. Regarded as a swing vote in some cases, Roberts has presided over an ideological shift toward conservative jurisprudence on the high court, in which he has authored key opinions.
https://en.wikipedia.org/wiki/John_Roberts