Personal Democracy Forum co-founder Micah Sifry spent some time Friday listening closely to President Obama’s remarks in Ohio and noticed a subtle difference in the chief executive’s rhetoric. It’s the difference between “Yes, we can” and “Yes, I can,” which Sifry explained in a post on PDF’s Tech President site.

In an Ohio speech described by political observers as indicative of how Obama is recalibrating his public rhetoric with a populist twist following Republican Scott Brown’s upset victory in last Tuesday’s Massachusetts special election for the U.S. Senate, the president used the word “I” over and over. Sifry counted at least 14 instances, always in conjunction the word “fighting.”