Table:
text: United States House of Representatives elections, 1988
Texas
Texas
District Incumbent Party First_elected Result_ Candidates
Texas 1 Jim Chapman Democratic 1985 Re-elected Jim Chapman (D) 62.2% Horace McQueen (R) 37.8%
Texas 3 Steve Bartlett Republican 1982 Re-elected Steve Bartlett (R) 81.8% Blake Cowden (D) 18.2%
Texas 8 Jack Fields Republican 1980 Re-elected Jack Fields (R) Unopposed
Texas 9 Jack Brooks Democratic 1952 Re-elected Jack Brooks (D) Unopposed
Texas 10 J. J. Pickle Democratic 1963 Re-elected J. J. Pickle (D) 93.4% Vincent J. May ( L ) 6.6%
Texas 12 Jim Wright Democratic 1954 Re-elected Jim Wright (D) Unopposed

Question: In the 1988 United States House of Representatives election, who were the candidates when Jack Fields was the incumbent in Texas' 5th congressional district?