Presses undecideds to pick a candidate: No, until a week before the election; yes, thereafter.
Average boost from pressing, last three samples:Unknown.
Disclosure of boost factor: Not published.
May weight your vote differently depending on your: Race, sex, age, or education, depending on census data, exit polls, and previous Zogby surveys.
Adjusts results to fit expected party shares of electorate: Yes.
Expected shares:39 percent Dem, 35 percent GOP. Zogby calculates party weights based on the last three elections and subtle adjustments for factors such as Hispanic population growth.