district      incumbent       party  first elected                                      results
0  oklahoma 1  john sullivan  republican           2002                                 re - elected
1  oklahoma 2      dan boren  democratic           2004                                 re - elected
2  oklahoma 3    frank lucas  republican           1994                                 re - elected
3  oklahoma 4       tom cole  republican           2002                                 re - elected
4  oklahoma 5  ernest istook  republican           1992  retired to run for governor republican hold

Table as JSON:
{"district":{"0":"oklahoma 1","1":"oklahoma 2","2":"oklahoma 3","3":"oklahoma 4","4":"oklahoma 5"},"incumbent":{"0":"john sullivan","1":"dan boren","2":"frank lucas","3":"tom cole","4":"ernest istook"},"party":{"0":"republican","1":"democratic","2":"republican","3":"republican","4":"republican"},"first elected":{"0":2002,"1":2004,"2":1994,"3":2002,"4":1992},"results":{"0":"re - elected","1":"re - elected","2":"re - elected","3":"re - elected","4":"retired to run for governor republican hold"}}