12. democratic incumbent running - republican challenger
13. democratic incumbent running - other challenger
14. democratic incumbent running - unopposed
19. democratic incumbent running - repub and other challengers
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 challengers
36. other incumbent running -- republican and other challengers
37. other incumbent running -- democratic and other challengers
39. other incumbent running -- democr, republ, other challengers
51. dem incumbent not running -- democratic candidate unopposed
52. dem incumbent not running -- republican candidate unopposed
53. dem incumbent not running -- other candidate unopposed
55. dem incumbent not running -- democratic and republican cands
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 unopposed
62. rep incumbent not running -- republican candidate unopposed
63. rep incumbent not running -- other candidate unopposed
65. rep incumbent not running -- democratic and republican cands
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 unopposed
72. other incumbent not running --republican candidate unopposed
73. other incumbent not running -- other candidate unopposed
75. other incumbent not running -- democratic, republican cands
76. other incumbent not running -- republican and other cands
77. other incumbent not running -- democratic and other cands
79. other incumbent not running -- democr, republ, other cands
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