Washington (CNN) - With just five days to go until the start of the Republican convention in Tampa, the race for the White House remains knotted up between President Barack Obama and Republican challenger Mitt Romney.
According to a CNN Poll of Polls compiled and released Wednesday, 47% of registered voters nationwide support the president, with 44% backing Romney, the former Massachusetts governor and presumptive GOP nominee.
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The CNN Poll of Polls is an average of four national polls of registered voters conducted since August 15: Gallup Daily Tracking (August 15-21), Monmouth University (August 15-19), Wall Street Journal/NBC News (August 16-20), and AP/GfK (August 16-20). All four surveys were conducted entirely after House Budget Chairman Paul Ryan was announced as Mitt Romney's running mate on the GOP ticket.
While the CNN Poll of Polls does not have a sampling error because it's a mathematical average of multiple surveys. But the margin between the candidates in each poll is within that survey's sampling error, meaning the race is statistically tied.
CNN Political Editor Paul Steinhauser contributed to this report