In 1935, Moncure won election to the Virginia General Assembly to succeed Herring as the delegate for Stafford and Prince William Counties (as the district was then called), and was re-elected in 1937 but chose not to seek reelection in 1939.
In 1935, Moncure won election to the Virginia General Assembly (a part-time position) to succeed Herring as the delegate for Stafford and Prince William Counties (as the district was then called). He was re-elected in 1937, but chose not to seek reelection in 1939.