The Iowa visit will be the first major appearance there since November for the potential presidential candidate.
In February, Democrats held only a 2-point lead.
A report says Kathleen Sebelius is thinking about a Senate run in Kansas.
“'No' is the answer — plain and simple," he said on NBC.
"I think he appeals to the lowest common denominator,” King said.
The first fundraising quarter of 2014 is in the books.
Time is running out for Congress to fix the Voting Rights Act.
Sen. Mark Pryor (D-Ark.) raised $1.22 million in the last three months.
Rep. John Barrow (D-Ga.) is fighting to hold onto his House seat.
The Mississippi senator faces one of the toughest primaries in the nation.