(CNN) – President Barack Obama’s re-election campaign filed a complaint Tuesday, claiming a conservative group founded by Karl Rove is in violation of election law by not disclosing its donors.

In a letter to the Federal Election Commission, a lawyer for Obama’s campaign argued that Crossroads GPS is a political committee–not a charitable organization–and therefore should meet disclosure requirements.

via Obama campaign pressures Crossroads GPS to disclose donors – CNN Political Ticker – CNN.com Blogs.