12. Democratic incumbent running - Republican challenger
13. Democratic incumbent running - other challenger
14. Democratic incumbent running - unopposed
19. Democratic incumbent running - Repub and other challenge
21. Republican incumbent running - Democratic challenger
23. Republican incumbent running - other challenger
24. Republican incumbent running - unopposed
29. Republican incumbent running - Dem and other challengers
31. Other incumbent running - Democratic challenger
32. Other incumbent running - Republican challenger
34. Other incumbent running - unopposed
35. Other incumbent running - Democratic, Republican challen
36. Other incumbent running -- Republican and other challeng
37. Other incumbent running -- Democratic and other challeng
39. Other incumbent running -- Democr, Republ, other challen
51. Dem incumbent not running -- Democratic candidate unoppo
52. Dem incumbent not running -- Republican candidate unoppo
53. Dem incumbent not running -- other candidate unopposed
55. Dem incumbent not running -- Democratic and Republican c
56. Dem incumbent not running -- Republican and other cands
57. Dem incumbent not running -- Democratic and other cands
59. Dem incumbent not running -- Democr, Republ, other cands
61. Rep incumbent not running -- Democratic candidate unoppo
62. Rep incumbent not running -- Republican candidate unoppo
63. Rep incumbent not running -- other candidate unopposed
65. Rep incumbent not running -- Democratic and Republican c
66. Rep incumbent not running -- Republican and other cands
67. Rep incumbent not running -- Democratic and other cands
69. Rep incumbent not running -- Democr, Republ, other cands
71. Other incumbent not running --Democratic candidate unopp
72. Other incumbent not running --Republican candidate unopp
73. Other incumbent not running -- other candidate unopposed
75. Other incumbent not running -- Democratic, Republican ca
76. Other incumbent not running -- Republican and other cand
77. Other incumbent not running -- Democratic and other cand
79. Other incumbent not running -- Democr, Republ, other can
81. No race in state - Democratic incumbents
82. No race in state - Republican incumbents
85. No race in state - Democratic and Republican incumbents
87. No race in state - Democratic and other incumbent
88. No race in state - Republican and other incumbent