We have a primary election for a reason. If it comes down to obama v say romney, bachmann, or whoever, only a moron would vote third party or write someone else in at this point.
Right now I am voting for ron paul in the primary but will vote for bachmann if she can keep romney from getting the nod.
However, if say romney gets the nod, I will no doubt vote for him.
Ron paul needs to upo his game if he wants to go further as his campaigning style needs to be tighter and more aggressive.