Andrew Smith, director of the UNH Survey Center, has predicted that incumbent Governor John Lynch will be reelected with between 55 and 58 percent of the vote. I don’t think so.
The Real Clear Politics average of major polls has Lynch up 50 to 40.3 percent over challenger John Stephen, with 9.7 percent undecided. But at this late point in the election, the “incumbent rule” cannot be ignored, which seems to be what Smith is doing.
Essentially, the “incumbent rule” is that voters who are still undecided late in an election disproportionately break for the challenger. And so the important number is not the spread between the incumbent and the challenger, but where the incumbent is polling.
The rule of thumb is that if the incumbent is polling at 50 percent or higher, he is likely to win. At 48 to 49 percent it is a toss-up. And incumbents polling at 47 percent or less are likely to lose.
Smith’s own polling has Lynch…