UPDATE: Hubbell told Iowa Independent he’s not interested in running against Grassley.

The Progressive Change Campaign Committee and Democracy for America have produced a new television commercial, which asks which side Chuck Grassley is on:

Click here to donate to help keep this ad on the air in Iowa and Washington, DC.

Speaking of which side Grassley’s on, Monday’s Des Moines Register reports on our senior senator’s massive campaign contributions from health industry interest groups. Thomas Beaumont’s story was based on numbers compiled by Maplight.org.

Meanwhile, Representative Bruce Braley confirmed on Friday that he is running for re-election in Iowa’s first Congressional district. I consider him highly likely to run for U.S. Senate when one of our current senators retires.

Rumors persist that a prominent Democrat will join Bob Krause and Tom Fiegen in challenging Grassley next year. Al Swearengen of The Iowa Republican blog speculates that Fred Hubbell is the mystery candidate. Hubbell currently chairs the Iowa Power Fund Board. From his official bio:

Fred S. Hubbell was a member of the Executive Board and Chairman of Insurance and Asset Management Americas for ING Group. Mr. Hubbell retired from ING Group’s Executive Board effective April 25, 2006. Mr. Hubbell was formerly Chairman, President and Chief Executive Officer of Equitable of Iowa Companies, an insurance holding company, serving in his position as Chairman from May 1993 to October 1997, and as President and Chief Executive Officer from May 1989 to October 1997.

Charlotte Hubbell, Fred Hubbell’s wife, serves on the Environmental Protection Commission.