The central part of Iowa is the state 's most Republicans area . Democratic candidates have n't had as much success with the Register 's endorsement . Mississippi River is home to the most Democratic . Support of Linn County 's largest newspaper , GOP , highly sought . Weather may affect how many people turn out .
The central part of Iowa is the state 's most Republicans area . Mississippi River is home to the most Democratic . Support of Linn County 's largest newspaper , GOP , highly sought . Weather may affect how many people turn out .