King's interest in the race complicates GOP hopes at picking up a seat held by 30 years by Sen. Tom Harkin (D-Iowa), who is retiring. King is a favorite of the GOP base in the state but his hardline conservative views — and some past controversial statements — have Republican strategists worried he won't be able to compete statewide in the swing state. Polls show him in a strong position in the primary but much weaker in the general election than other possible candidates.
"If I would back up in front of Karl Rove's initiative, that would just empower him, and he would go on state after state, candidate after candidate," King said of Rove. "I don’t think any individual has the wisdom to make those kind of decisions, but I think Iowans together can make those decisions and should. That's the principle. We have to fight this out in the court of public opinion."