While both the Quinnipiac and the PPP polls were based on relatively large samples (1200-1500 likely voters), the Quinnipiac poll was conducted over an entire week (3/24-3/31), whereas the PPP poll was completed on Monday and Tuesday.

Clinton's campaign took big hits over her Bosnia amnesia at the end of last week, and many of those surveyed in the early days of the Quinnipiac poll would not have been affected. All of the respondents in the PPP poll had a chance to hear about the Bosnian flap.