quickest way to get passport (daughter lost hers)

What state do you live in? How old is your daughter?

For land travel to and from Canada, children under 16 do not need to have or present a passport--just a birth certificate. (Of course, a passport is also acceptable as proof of citizenship!)

If you're from one of the handful of states that issues enhanced driver's licenses, that is also acceptable and sufficient documentation and may involve less wait time than a passport. It's also mighty convenient.