Table:
text: United States House of Representatives elections, 1994
Ohio
Ohio
District Incumbent Party First_elected Status_ Opponent
Ohio1 David S. Mann Democratic 1992 Defeated Republican gain Steve Chabot (R) 56.1% David S. Mann (D) 43.9%
Ohio2 Rob Portman Republican 1993 Re-elected Rob Portman (R) 77.6% Les Mann (D) 22.4%
Ohio4 Mike Oxley Republican 1981 Re-elected Mike Oxley (R) unopposed
Ohio5 Paul Gillmor Republican 1988 Re-elected Paul Gillmor (R) 73.4% Jarrod Tudor (D) 26.6%
Ohio6 Ted Strickland Democratic 1992 Defeated Republican gain Frank Cremeans (R) 50.9% Ted Strickland (D) 49.1%
Ohio7 Dave Hobson Republican 1991 Re-elected Dave Hobson (R) unopposed
Ohio8 John Boehner Republican 1990 Re-elected John Boehner (R) unopposed

Question: What is the party whose opponent Mike Oxley (R) is unopposed in the 1994 United States House of Representatives election in Ohio?