First Lady first up as Democrats try to break deadlock_美文

First Lady first up as Democrats try to break deadlock

Forty percent of adults asked over the last three days said the convention had made them more likely to vote for Romney in November's election, but a similar 38 percent said events in Florida made them less likely to back him.

Obama led the man trying to deny him a second term by 47 percent to 46 percent in Gallup's latest daily tracking poll, which has rarely strayed beyond the margin of error since Romney became the presumptive nominee in April.

Though cheered by polling data, Democrats were also trying to put out the latest campaign brush fire, after several top party figures struggled to answer on Sunday whether Americans were better off after four years of Obama.

"America is better off today than they (Republicans) left us," said Vice-President Joe Biden, campaigning in Michigan.

"Let me just sum it up this way ... Osama Bin Laden is dead and General Motors is alive."

But Republican vice-presidential hopeful Paul Ryan, in a raid into North Carolina ahead of the Democratic convention, drew comparisons between Obama and one-term Democratic president Jimmy Carter, who was felled by a poor economy.

"The president can say a lot of things, and he will, but he can't tell you that you're better off. Simply put, the Jimmy Carter years look like the good old days compared to where we are right now."

In a sign of how close the Obama campaign believes the race remains, the president continued a four-day "Road to Charlotte" tour taking in territory that will decide November's election.