WASHINGTON — President Bush's ambitious plan to give millions of undocumented immigrants a shot at legal temporary work in the United States is dead in Congress. Two hurricanes, two Supreme Court nominees, Republican in-fighting and the president's own slump in the polls have put Bush's "guest worker" initiative on the shelf for this year. Instead of rallying behind the Bush temporary worker proposal, conservative Republicans are about to head in the opposite direction with legislation to crack down on undocumented immigrants and companies that employ them. "Political momentum has changed in our favor," said Rep. Tom Tancredo, R-Colo., who leads...