no, i think that the us public are in general following the line the uk public are.
do you think saddam is a bad man? yes
do you think that if he is shown to be bad enough we should use military force? yes
should we do it with a un mandate? yes
without a un mandate? umm, err, perhaps
as pt pointed out the questions are different and cannot be equitably compared. support of the un is important to how the war with saddam hussein is percieved by the public. with it we can easily claim to be working for a common good, through international law etc. without it it looks like warmongering.
its the whole reason that tony blair has been stalking europes leaders drumming up support. when the second resolution comes [as it surely will come down to] the vote needs to be as secure as possible even if the evidence isn't.