Hurray! I can direct you to the online version of the Washington Spectator, edited by Lou Dubose. (Didn't used to be able to unless you were a dead tree version subscriber - consider becoming one! - IIRC...)
The articles notes parallels between the Seligman case and a 1990 case involving Jim Hightower, which I was not previously aware of, not having been living in Texas at the time.
This wouldn't be the first time that Rove used contacts within the Justice Department to destroy the career of a political adversary. Siegelman's prosecution bears a striking familiarity to the FBI investigation of Texas Agriculture Commissioner Jim Hightower in 1990, and the conviction of two of his aides.
Like Siegelman, Hightower was the "golden boy" of Democratic politics in his state. Until he decided to run for re-election, Hightower was his party's best hope to unseat U.S. senator Phil Gramm. He had cultivated a national following, national funders, and was an effective voice for the progressive wing of the national Democratic Party. In 1990, Hightower was an incumbent who couldn't be beat—until two federal agents with search warrants walked into his Austin office the same day he was kicking off his re-election campaign in a small rural town in the Panhandle. Hightower's Republican opponent was Rick Perry, currently the governor of Texas. Perry's campaign was directed by Karl Rove.
More:
http://www.washingtonspectator.com/articles/20071115siegelman.cfmEdited to say that I hope you can access the article - it just occurred to me that I might have logged in and told the site to remember me - I can never remember when I do that....