if you believe Bush broke the law, then you are de-facto arguing for impeachment. if you believe that "US persons" dialing/receiving calls from certain foreign phone numbers linked to AQ merit warrants that were not obtained - then its no different then learning that Bush used wiretaps on purely domestic communications without warrants. the crime of failing to obtain warrants would be the same in both cases (different statutes aside). so if we found out tomorrow (hypthetically) that Bush had ordered FBI wiretaps without warrants on Ronnie Earle's calls to the DNC, would that be an impeachable offense?