Obama moves to general-election mode

Democratic White House hopeful Barack Obama is bidding this week to reach a symbolically potent milestone in his nominating battle with Hillary Clinton and take the fight to Republican John McCain. When Kentucky and Oregon hold their primaries on Tuesday, the Illinois senator expects to clinch a majority of elected Democratic delegates and put another nail in the coffin of Clinton's own presidential dream. Obama is not planning to spend the election night in either state, heading instead to Iowa -- the scene of his triumph in the year's debut Democratic contest -- before spending the rest of the week in Florida.