Born in Merrill, Wisconsin, Tewes graduated from Merrill High School. In 1938, Tewes graduated from Valparaiso University in Valparaiso, Indiana and two years later graduated from the University of Wisconsin Law School being admitted to the Wisconsin Bar. Tewes practiced law in Merrill. During World War II, Tewes served in the United States Army Air Forces, as an intelligence officer in the Flying Tigers, in the China-Burma-India Theater. After the war, he was president of the Tewes Plastic Corporation in Waukesha, Wisconsin, retiring in 1994.About Tewes Corp. Tewes voted in favor of the Civil Rights Act of 1957. In 1958, Tewes was defeated, while seeking reelection to Congress.Political Graveyard.comBiographical sketch In the 1960 election, Tewes was also defeated, while seeking election again to his former house seat.United States Federal Election 1960
