They could do that, but any delay they do now is only going to make it less likely for Obama to be on the ballot. If an audit ends up being required it will take time - more time than there is between the DNC Convention and Nov 8th.
In addition, what Bennett is doing actually benefits Arizona democrats, because it protects their ability to choose an ELIGIBLE candidate with their delegates to the Dem Convention. If Bennett was just being a political hack he would have left this to the last minute and then denied placement on the ballot. As it is, he is letting the DNC know that if their candidate is not able to prove his eligibility he’s not going to be on the ballot. Bennett is providing a service to the dems by letting this be known now. The DNC is officially on notice that their OCON and an affidavit from Obama are not going to be enough...
You are doing a FRoutstanding job!!! Wish I could do more to help...