TRENTON Donald Trump's apparent pivot away from his calls for mass deportations of millions of undocumented immigrants is partially the result of prodding by New Jersey Gov. Chris Christie, according to former New York Mayor Rudy Giuliani. And, Giuliani says, even more Christie-inspired changes to Trump's immigration stance will be forthcoming, like his call for tracking immigrant visas like Fedex packages, and using the E-Verify system to reduce illegal labor.