| Number of incumbents with no
major party opponents |
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House |
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Senate |
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| Year |
D |
R |
Total |
|
D |
R |
Total |
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|
| 2000 |
35 |
43 |
78 |
38% |
4 |
4 |
8 |
32% |
| 2002 |
43 |
32 |
75 |
37% |
3 |
1 |
4 |
16% |
| 2004 |
42 |
50 |
92 |
45% |
3 |
4 |
7 |
28% |
| 2006 |
29 |
27 |
56 |
28% |
5 |
0 |
5 |
20% |
| 2008 |
52 |
45 |
97 |
48% |
2 |
2 |
4 |
16% |
| 2010 |
29 |
41 |
70 |
34% |
4 |
7 |
11 |
44% |
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| Average |
230 |
238 |
468 |
38% |
21 |
18 |
39 |
26% |
| During Decade |
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| Source: Pa. Department of State, Elections
Bureau |
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