f03dbc0dba0f6382240b4f0aeb95e8f7President Obama will announce Thursday that he will use his executive authority to expand temporary protections to millions of undocumented immigrants, according to several individuals who have been briefed on the decision. Obama will travel to Las Vegas on the heels of that announcement to rally support for his initiative on Friday. Congress will receive official details on the move Thursday, according to a senior Democratic Party official. Even before final confirmation of the president’s plans, outside advocates began readying events to promote the administration’s immigration policy. More