According to the poll.
"Nearly half of the Republicans polled said that Giuliani represents their
party's best chance to win in November 2008; that is three or four times as high
as the percentage who mentioned other candidates."
It is important to note that this poll was conducted nationwide; analyzing poll numbers in specific states will reveal somewhat different numbers. It is the early primary states, such as Iowa, New Hampshire and South Carolina that give a better view of where candidates stand. If candidates do better than expected, or worse than expected, in those early states, there chances could change drastically across the nation.
For more on the poll, click here.