I think the current rating in electability is: Gatsas>Forrester>Van Ostern>Sununu>Connolly.
Idk about the rest, but Gastas is a pretty weak candidate who only won re-election against a B-list opponent by the skin of his teeth.
In a city election, that's pretty good for the Republicans.
Manchester is a Republican stronghold, IIRC.
Obama carried the county twice, so I'd say it only leans slightly R, if at all.
1) Talking about the city
2) Obama ran well ahead of most Democrats in NH
3) Those were national elections