Iowa Democratic Party chair Michael Kiernan spoke confidently today about a “first-round draft pick” who is ready to run against Senator Chuck Grassley, Kay Henderson reported for Radio Iowa.

“I’m going to tell you here today that Chuck Grassley is going to be in for the race of his life.” […]

“You’re just going to have to wait to find out,” Kiernan said this morning during taping of this weekend’s “Iowa Press” program.  “We want to wait ’til, obviously, after Terry Branstad announced his candidacy for governor.”

Kiernan isn’t revealing the characteristics this phantom candidate may have either. “I’ll just wait for the announcement,” Kiernan said.  “You will be impressed.” […]

“I’m here to tell you today that it will be the toughest race that Chuck Grassley has faced since John Culver,” Kiernan said.

Grassley defeated Senator John Culver (Governor Chet Culver’s father) in the 1980 Reagan landslide.

Speaking to reporters after today’s taping, Kiernan said the big-name challenger is “100 percent committed” to this race.

Your guess is as good as mine. A retired politician? Christie Vilsack? A celebrity in a non-political field? Someone from the business world? (Retired Principal Financial Group CEO Barry Griswell has ruled out running, as has Fred Hubbell, the incoming interim director of the Iowa Department of Economic Development.)

Grassley’s approval rating has fallen this year, but it’ll take a lot to convince me that we can defeat him. He’s still got a strong brand name and 30 years of constituent service behind him.