Table:
text: United States House of Representatives elections, 1986
Texas
Texas
District Incumbent Party First_elected Result_ Candidates
Texas 13 Beau Boulter Republican 1984 Re-elected Beau Boulter (R) 64.9% Doug Seal (D) 35.1%
Texas 14 Mac Sweeney Republican 1984 Re-elected Mac Sweeney (R) 52.3% Greg Laughlin (D) 47.7%
Texas 15 Kika de la Garza Democratic 1964 Re-elected Kika de la Garza (D) Unopposed
Texas 16 Ronald D. Coleman Democratic 1982 Re-elected Ronald D. Coleman (D) 65.7% Roy Gillia (R) 34.3%
Texas 17 Charles Stenholm Democratic 1978 Re-elected Charles Stenholm (D) Unopposed
Texas 18 Mickey Leland Democratic 1978 Re-elected Mickey Leland (D) 90.2% Joanne Kuniansky (I) 9.8%
Texas 19 Larry Combest Republican 1984 Re-elected Larry Combest (R) 62.0% Gerald McCathern (D) 38.0%

Question: How many districts does Mac Sweeney have as incumbent in the 1986 United States House of Representatives election from Texas?