Barack Obama is leading John McCain 46 percent to 41 percent in a Time Magazine poll conducted July 31-Aug. 4. The margin of error is 3 percent. That's the same size lead Obama held in this poll in June.

Time says that the survey indicates some trouble signs for Obama. He does well on "atmospherics" such as being seen as more likeable (besting McCain 65 percent to 20 percent), on which candidate would really bring change (Obama leads 61 percent to 17 percent) and on who understands voters' concerns the best, (Obama leads 48 percent to 35 percent). But on specific issues, Obama only leads McCain 43 percent to 39 percent on the economy, down a point from June, and McCain is seen as the candidate better equipped to manage the Iraq war by 51 percent to 36 percent. McCain also leads when it comes to voter confidence in who could better handle the war on terror, by 56 percent to 29 percent.

Obama also enjoys an "enthusiasm" advantage, as other polls have shown. Forty-nine percent of his supporters describe themselves as enthusiastic compared to 21 percent of McCain supporters. Twenty-seven percent of Republicans say they are "not very" or "not at all" enthusiastic about McCain while only 10 percent of Democrats say that of Obama.