All the feisty talk from Sen. Hillary Clinton and her campaign advisers Wednesday couldn't dispel the growing perception among Democrats that the party's presidential race is nearly over, and that Sen. Barack Obama is going to be the winner.Tuesday's dual primaries technically yielded a split decision, as expected. But once Democrats grasped the final results - Sen. Clinton's near-loss in Indiana's primary, where she recently was heavily favored, and her larger-than-expected defeat in North Carolina - the New York senator took on the air of a loser, even to many of her own supporters."The air is completely let out of them," said first-term Rep. Jason Altmire of Pennsylvania, who is uncommitted to either candidate, referring to the Clinton supporters among his congressional colleagues. "They are resigned to the fact that it's probably not going to work out."Suddenly, a primary day that few expected to be decisive in the Democrats' long and close contest was interpreted on all sides as a game-changer. The first female with a serious shot at a major party's nomination, and election to the presidency, appeared to have fallen irrevocably behind, giving way to the first African-American likewise considered a viable contender for the same goal.