An increase in support from women as well as independents gives Barack Obama a post-convention advantage over challenger Mitt Romney.  The president receives a five percentage-point bounce among women and a 12-point bounce among independents, in a Fox News poll released Wednesday.  

Overall, the Obama-Biden ticket tops the Romney-Ryan ticket by 48 to 43 percent among likely voters.  The president's advantage is within the poll's margin of sampling error.  

That's a four-point "convention bounce" for Obama among likely voters. Before the conventions, Romney edged Obama by one point (45-44 percent, August 19-21, 2012).  

Meanwhile, Romney supporters were 10 points more likely than Obama supporters to say it is "extremely" important their candidate wins (64 percent to 54 percent) before the conventions.  That enthusiasm edge has evaporated.  Now, 63 percent of Romney supporters and 62 percent of Obama supporters believe it is extremely important their candidate wins.