Busbey was elected as a Republican to the 78th Congress (January 3, 1943 – January 3, 1945). He was an unsuccessful candidate for reelection in 1944 to the 79th Congress.
Busbey was elected in 1946 to the 80th Congress (January 3, 1947 – January 3, 1949). He was an unsuccessful candidate for reelection in 1948 to the 81st Congress.
Busbey was elected to the 82nd and 83rd Congresses (January 3, 1951 – January 3, 1955). He was an unsuccessful candidate for reelection in 1954 to the 84th Congress. He resumed the investment brokerage business until his retirement in 1958. He resided in Cocoa Beach, Florida until his death there and was interred in Mount Hope Cemetery in Chicago.