Newsweek poll: Obama leads McCain by 15

These are good numbers:

A new NEWSWEEK Poll shows that he has a substantial double-digit lead, 51 percent to 36 percent, over McCain among registered voters nationwide.

In the previous NEWSWEEK Poll, completed in late May when Clinton was still fighting him hard for the Democratic nomination, Obama managed no better than a 46 percent tie with McCain....

The latest numbers on voter dissatisfaction suggest that Obama may enjoy more than one bounce. The new poll finds that only 14 percent of Americans say they are satisfied with the direction of the country. That matches the previous low point on this measure recorded in June 1992, when a brief recession contributed to Bill Clinton's victory over Bush's father, incumbent George H.W. Bush. Overall, voters see Obama as the preferred agent of "change" by a margin of 51 percent to 27 percent. Younger voters, in particular, are more likely to see Obama that way: those 18 to 39 favor the Illinois senator by 66 percent to 27 percent. The two candidates are statistically tied among older voters.

Obama's current lead also reflects the large party-identification advantage the Democrats now enjoy—55 percent of all voters call themselves Democrats or say they lean toward the party while just 36 percent call themselves Republicans or lean that way.