Washington (CNN) - It's dead even in a new national poll in the race for the White House.
And the survey also indicates that there's a major difference in motivation between supporters of President Barack Obama and Republican challenger Mitt Romney.
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According to an ABC News/Washington Post poll released Tuesday morning, 47% of registered voters nationwide say if the November election were held today, they would vote for the president, with an equal amount saying they would cast a ballot for Romney, the presumptive GOP nominee.
The ABC News/Washington Post survey is the latest in a string of national polls released over the past two weeks to indicate the battle for the presidency either tied up or with only a slight edge for Obama.
While the horserace is all knotted up, there's a wide gap when it comes to motivation. Three-quarters of Obama supporters say their vote is for him, with just 23% saying they're voting against Romney. Only 37% of Romney supporters say their vote is for their candidate, with nearly six in ten saying their vote is against Obama. There was a similar trend in President George W. Bush's 2004 re-election victory over Sen. John Kerry of Massachusetts, the Democratic nominee.
The ABC News/Washington Post poll was conducted July 5-8, with 1,003 adults nationwide, including 855 registered voters, questioned by telephone. The survey's sampling error for registered voters is plus or minus four percentage points.