"Barack Obama met the 50 percent threshold for the first time Tuesday in the Gallup daily tracking poll, a symbolic hurdle that until now had eluded the Democratic nominee.

The Gallup daily tracking poll has found that since the conclusion of the Democratic convention, Obama has risen 5 percentage points in the polls and now leads John McCain 50 percent to 42 percent. That represents a positive turn for Obama, after a couple of days in which he appeared to have peaked at the 49 percent mark while McCain was showing slight improvements.

The survey indicates that Obama's overall post-Democratic National Convention bounce now appears to be roughly at par with the norm of past conventions. Though smaller than several of the sizable bounces of recent decades, the new polling suggests that perhaps the Democratic convention bounce has yet to subside.

While an improvement from 49 percent to 50 percent is statistically insignificant, the 50 percent mark holds significance for a party seeking to win its first majority since 1976, when Jimmy Carter won with 50.1 percent.

Polling will likely remain in flux until early next week, after the conclusion of the Republican National Convention. On Saturday, Gallup reported Obama was ahead by 8 percentage points. By Monday, that lead had shrunk to 5 points. Today it returned to 8. " (9-2-08)