Rachel Maddow went after Karl Rove for his bizarre appearance on Fox News last week where, when asked about the complaint filed against his so-called "advocacy group," Crossroads GPS, Rove went off on a tangent and started ranting about Bob Bauer, the lawyer who filed the complaint. Rove claimed that Bauer represented the whistle blower Dana Jill Simpson in the Don Siegelman case, which as Maddow noted, is not true, and has nothing to do with the type of ads his group is running and whether they're violating the law.

Chris Matthews did a segment on Rove's group with Dan Froomkin and Joe Conason last month where they were looking at whether the IRS might go after Rove's group for the abuse of their tax status.

The Huffington Post has more on the dust up between Rove and the Obama campaign's attorney here: Bob Bauer, Obama Campaign's Top Lawyer, Demands Retraction From Karl Rove: