In the Republican nomination race for the White House in 2008, former U.S. Senator Fred Thompson, while still not a declared candidate, has edged marginally ahead of former New York City Mayor Rudy Giuliani.
Nearly three in ten (29 percent) of those who expect to vote in a Republican primary or caucus would vote for Thompson while 28 percent would vote for Giuliani (and a one percent difference is not statistically significant).
On the Democratic side, the top contenders have not changed. Sen. Hillary Clinton of New York is still in the lead, as more than one-third (35 percent) of those who would vote in a Democratic primary or caucus would vote for her, while 28 percent would vote for Sen. Barack Obama of Illinois.
Looking at the next tier of candidates on the Republican side, Sen. John McCain of Arizona leads the group with 17 percent followed by former Massachusetts Gov. Mitt Romney (9 percent) and former House Speaker Newt Gingrich of Georgia (6 percent).
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Among Democrats, 14 percent would vote for former Sen. John Edwards of North Carolina, 13 percent for fformer Vice President Al Gore of Tennessee and 5 percent for New Mexico Gov. Bill Richardson. All other candidates on both the Republican and Democratic side are supported by less than five percent.
These are some of the results of a Harris Poll of 2,225 U.S. adults surveyed online by Harris Interactive between July 6 and 13, 2007. This survey included 822 adults who expect to vote in a Democratic primary or caucus and 560 adults who expect to vote in a Republican primary or caucus.