Reuters: New Zealand Prime Minister Helen Clark on Friday called a general election for Nov. 8, hoping to extend her nine-year rule despite being dogged by economic recession and political scandal. Clark’s Labour-led minority coalition, which has been in power since 1999, has trailed the centre-right National Party for the past year, and is currently 13 percentage points behind in a Reuters survey of five main polls. “This election is about trust,” Clark told a news conference. “It is …