Table:
text: United States House of Representatives elections, 1970
Illinois
Illinois
District Incumbent Party First_elected Result_ Candidates
Illinois 18 Robert H. Michel Republican 1956 Re-elected Robert H. Michel (R) 66.1% Rosa Lee Fox (D) 33.9%
Illinois 19 Tom Railsback Republican 1966 Re-elected Tom Railsback (R) 68.2% James L. Shaw (D) 31.8%
Illinois 20 Paul Findley Republican 1960 Re-elected Paul Findley (R) 67.5% Billie M. Cox (D) 32.5%
Illinois 21 Kenneth J. Gray Democratic 1954 Re-elected Kenneth J. Gray (D) 62.5% Fred Evans (R) 37.5%

text: United States House of Representatives elections, 1970
Illinois
Illinois
District Incumbent Party First_elected Result_ Candidates
Illinois 2 Abner J. Mikva Democratic 1968 Re-elected Abner J. Mikva (D) 74.7% Harold E. Marks (R) 25.3%
Illinois 4 Ed Derwinski Republican 1958 Re-elected Ed Derwinski (R) 68.0% Melvin W. Morgan (D) 32.0%
Illinois 7 Frank Annunzio Democratic 1964 Re-elected Frank Annunzio (D) 87.3% Thomas J. Lento (R) 12.7%
Illinois 9 Sidney R. Yates Democratic 1964 Re-elected Sidney R. Yates (D) 75.8% Edward Wolbank (R) 24.2%
Illinois 12 Robert McClory Republican 1962 Re-elected Robert McClory (R) 62.1% James J. Cone (D) 37.9%
Illinois 13 Phil Crane Republican 1969 Re-elected Phil Crane (R) 58.0% Edward A. Warman (D) 42.0%

Question: When was the first election when the party was Republican and the candidate Robert H. Michel (r) 66.1% Rosa Lee Fox (d) 33.9% below Illinois in the United States House of Representatives election, 1970 ?