they'll say he spammed the polls with supporters...and that the straw poll is in no way representative of his actual numbers...and that the only reason he won was because the front runners scaled back their efforts in Iowa and his supporters used Romney's tickets by lying about their support
they would say the big three did not show up and thus hard core Paul supporters and Democrats tainted the process. Its only a straw poll etc. Of course the new whipping boy would be Romney and Fred would have to jump in. That said, if Iowans can scurry and get 4,500 to 6,000 Paul votes it would be hilarious.
The mainstream media will say over and over that the Straw poll has lost it's significance and that the Ron Paul campaign had some dark stratagem to skew the results.
No amount of spin could possibly work. Meetup groups would explode. Donations would explode. Coverage would explode. The more they tried to explain it away with conspiracy, the more crazy they would become and the more well known Dr. Paul and his position would become.