McClatchy Newspapers: The Environmental Protection Agency told the Bush administration that by law California should be able to set air-quality standards that were tougher than federal law, but President Bush rejected the advice and made clear that he wanted a single national standard, a former EPA official said Tuesday. The testimony from whistleblower Jason Burnett came as the Senate Environmental and Public Works Committee’s chairwoman, Sen. Barbara Boxer, D-Calif., is investigating what she charges is …