He was elected as a Republican to the 76th Congress and to the five succeeding Congresses. In 1947–8, he served on the Herter Committee.[1] During World War II Kunkel spoke out against Nazi Germany, even before American entry into the war. After the Fall of France and before the Nazi invasion of the Soviet Union, when Great Britain was effectively fighting alone, Kunkel advocated helping Britain in their war against the Nazis. He voted in favor of both the 1941 Lend Lease Act to send more military aid to Great Britain, and the 1944 Lend Lease Act as well.[2][3]
He was not a candidate for renomination in 1950 but was an unsuccessful candidate for the nomination for United States Senator. He served as county commissioner of Dauphin County, Pennsylvania from 1952 to 1956. He was elected as a Republican to the 87th Congress, by special election, to fill the vacancy caused by the death of United States Representative Walter M. Mumma. He was reelected to the two succeeding Congresses and served until his resignation on December 30, 1966. He was not a candidate for reelection in 1966.