Poll: Race for White House tied
DENVER, Colorado (CNN) -- It's a dead heat in the race for the White House.
Barack Obama announced Saturday that Joe Biden will be his running mate.
The first national poll conducted after Barack Obama publicly named Joe Biden as his running mate suggests that the battle for the presidency between the Illinois senator and John McCain is all tied up.
In a new CNN/Opinion Research Corp. poll released Sunday night, 47 percent of those questioned are backing Obama, the presumptive Democratic presidential nominees, with an equal amount supporting his Republican opponent, McCain.
"This looks like a step backward for Obama, who had a 51 to 44 percent advantage last month," said CNN Polling Director Keating Holland. "Even last week, just before his choice of Joe Biden as his running mate became known, most polls tended to show Obama with a single-digit advantage over McCain."
So what's the difference now?
It may be supporters of Hillary Clinton, who still would prefer the New York senator and former first lady as the Democratic Party's presidential nomineeSixty-six percent of Clinton supporters -- registered Democrats who want Clinton as the nominee -- are now backing Obama. That's down from 75 percent in the end of June. Twenty-seven percent of them now say they'll support McCain, up from 16 percent in late June.