Democrats are letting former Gov. Tommy Thompson (R) know what he can expect if he decides to challenge Sen. Russ Feingold (D).

In the latest of a stream of attacks against Thompson, who is weighing whether to run for the seat that Feingold has held for three terms, the Wisconsin Democratic Party released a Web video that calls attention to Thompson’s membership on numerous corporate boards and his association with the law and lobbying giant Akin Gump Strauss Hauer & Feld.

The attacks began two weeks ago, after a former Thompson campaign manager said Thompson could soon form a Senate exploratory committee.

Some Republicans are skeptical about Thompson’s interest in such a race, even though polls show that he would be very competitive.

The Republican primary already includes real estate developer Terrence Wall, who is well-funded, and businessman Dave Westlake.