Complex sentence: The eurosceptic United Kingdom Independence Party will not field a candidate against Carswell in the 2010 general election and will campaign for his re-election as a result of his anti-EU views.
Split into simpler sentences: The eurosceptic United Kingdom Independence Party decided not to field a candidate against Carswell in the 2010 general election. Instead, UKIP actively campaigned for his re-election as a result of his anti-EU views.