Reply #16: This is a good summary of what I meant, Hepburn. [View All]

[Deny and Shred]

Though honest crossovers for Hillary and hurtful ones for Obama are certainly happening. It is virtually impossible to differentiate between case #1 and #2, unless the crossover voter actually does what a few in Ohio did. Ohio asks non-Dems to sign a pledge to the principles of the party, and some wrote notes along with their signature indicating that they were only voting Democrat for one day.
Other than those people it's hard to know the true numbers, and reasons. I read on another DU thread where someone put the Ohio crossover number at 16,000, where OxycontinMan told his 'audience' to vote Hillary. If accurate, this is not insignificant.
Case#1 is people crossing over for real, case#2 is crossing over to keep the two candidates at one another's throats as long as possible.
Anecdotally, Obama has more of case 1, Hillary more of case 2. That isn't proof, but overt campaigns to engage in case two like the one by Captain Rush Rush do add credence.