Sen. Hillary Clinton leads fellow Democratic Party Sen. Barack Obama by 19 points in a Time magazine poll of likely presidential candidates in the 2008 race.
The same poll shows Sen. John McCain edging former New York City mayor Rudy Giuliani by a four-point margin among GOP hopefuls.
Clinton, New York's junior senator, was the choice among 40 percent of the random sampling of 1,064 registered voters who responded to the telephone poll. Obama, in his first term as Illinois junior senator, polled 19 percent for second place, with former North Carolina senator and vice presidential candidate John Edwards placing third with 11 percent.
Among Republicans, Arizona Sen. McCain holds a narrow 30 percent to 26 percent lead over Giuliani for the GOP nomination. Both men have formed exploratory committees, but neither has officially entered the 2008 race for the White House.
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The poll showed a virtual dead heat among the front-runners if they were to go on an win their respective party nominations. McCain and Clinton were tied at 47 percent each in a head-to-head contest. McCain would beat Obama or Edwards by a seven-point margin, according to the poll.