Obama campaign advisers are privately urging the networks and media figures to consider, as they evaluate the incoming results, that in Ohio there are areas where as much as 15% of the vote is provisional ballots.

The Obama camp isn't urging the networks to hold off on calling the race, but is suggesting that media types keep this fact in mind as they navigate competing efforts by the campaigns to suggest that they're on the way to victory.

Obama campaign aides are arguing that media folks should keep in mind that the provisional ballots come in later, and that since those ballots come from African American areas, such as Cleveland, the earlier totals are likely to favor Hillary. They're saying that it would be disenfranchising to black voters to calculate the results before these provisional ballots are in.

In conversations with media figures, Obama aides are pointing out that the nets erroneously called Missouri for Hillary before the provisional ballots came in and were later forced to reverse the results when those ballots came in from the St. Louis area and put Obama over the top.