A Washington Post-ABC News survey conducted Feb. 22-25 showed 64 percent of all respondents, including Democrats and unaffiliated voters as well as Republicans, said they had a favorable impression of Giuliani, a stronger showing than any other presidential contenders mentioned in the survey. The Pew Research Center also looked at the nominating contests from a historical perspective, and its findings may be more encouraging to Giuliani than to Clinton. Taking into account nearly 50 years of early pre-primary polls, the Pew analysts found that Republican front-runners often go on to capture their party’s nomination, but not so for leading Democrats....