What these polls tell us is that all of these states are very close.
Bush up 6% in Iowa is a bit surprising.
These are the last 4 Iowa polls:
Mason Dixon - Bush +6
ARG - TIE
Strategic Vision (R) - Bush +3
Chicago Tribune- Bush +2
A simple unthinking average of these 4 gives Bush +2.75
Mason-Dixon is I think universally regarded as a very good pollster.
But you never ever believe
any one poll.
A poll from a good firm does not mean it is right - it means it has a pretty decent
chance of being right
The last 4 polls range from Tied, and ARG is been a bit Bush unfriendly this year, up to Mason-Dixon showing Bush up 6, with two stops in between.
I would read these, taking everything into account, as perhaps a modest Bush lead, but "Tossup" is not a crazy call either.