In a bid to remake the enforcement of federal immigration laws, the Obama administration is deporting record numbers of illegal immigrants and auditing hundreds of businesses that blithely hire undocumented workers. The Immigration and Customs Enforcement agency expects to deport about 400,000 people this fiscal year, nearly 10 percent above the Bush administration's 2008 total and 25 percent more than were deported in 2007. The pace of company audits has roughly quadrupled since President George W. Bush's final year in office.