WASHINGTON - Before he ran for president Barack Obama quit smoking. Now that he's won the job, he may have to break another addiction: Checking his BlackBerry for e-mail. The president's e-mail can be subpoenaed by Congress and courts and may be subject to public records laws, so if a president doesn't want his e-mail public, he shouldn't e-mail, experts said. And there may be security issues about carrying around trackable cell phones