WASHINGTON (AP) – Outspoken congressman Steve King is facing a bigger challenge in 2012 than he has in the past, thanks to redistricting in Iowa and a potentially prominent opponent. Roughly half of King’s district will be new in 2012, with more Democrats and independents. And former Iowa first lady Christy Vilsack is his likely opponent.

In Iowa and other states where maps are being redrawn, such as Illinois and Texas, both national parties see opportunities and potential setbacks. Tweaks to districts can put seats that were once locked down for one party firmly in play. Or they can, as is the case of King in Iowa, push a conservative congressman to a territory where he’ll have to retest his message.