The House Ethics Committee is launching a full-tilt investigation of Republican Rep. Michele Bachmann of Minnesota. The committee announced on Friday it had received a referral from the Office of Congressional Ethics, an independent investigative body, and said in a brief statement that it would formally investigate the one-time Republican presidential candidate. A lawyer for Bachmann had previously acknowledged the investigation by the OCE and said that Bachmann was cooperating. That probe is focused in part on her short-lived presidential bid.