Former Delaware governor and congressman Mike Castle has died at 86. The Delaware Republican Party announced he died Thursday in Greenville.

Former Delaware Gov. Mike Castle, a Republican moderate who championed creating the popular 50 State Quarters Program of commemorative coins while he served in Congress, has died. He was 86. The Delaware Republican Party announced that Castle died Thursday in Greenville but shared no other details.

Castle was one of the most successful elected officials in Delaware history, serving two terms as governor and nine terms in the U.S. House.