Washington (CNN) - With six and a half months to go until November's presidential election, it's basically all tied up between President Barack Obama and all-but-certain Republican presidential nominee Mitt Romney, according to an average of the four national surveys conducted entirely after former Sen. Rick Santorum of Pennsylvania suspended his campaign on April 10.
A CNN Poll of Polls compiled and released Wednesday indicates that, on average, 47% of registered voters in the four polls say they back Obama, with 45% supporting Romney, the former Massachusetts governor who is making his second bid for the White House. With each poll having a sampling error greater than Obama's two-point margin over Romney, it's fair to say that the race can be considered a dead heat.
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The announcement by Santorum that he was suspending his campaign was widely seen as the moment when the presidential campaign entered a new phase, moving from a primary fight to a general election battle. Even though former House Speaker Newt Gingrich and Rep. Ron Paul of Texas continue their long-shot bids for the nomination, Romney is now generally considered the presumptive GOP presidential nominee.
As the CNN Poll of Polls is an average of other surveys, there is no sampling error for the results.