c'mon, Mr. President, not one more kid needs to die overseas wearing a uniform with our flag on it.
c'mon, they're not exactly grabbing pitchforks and forming a third party.
If he thinks that he can get a deal he likes, I'd expect to see a c'mon-guys-we-can-do-this conciliatory exhortation.
Eugene Volokh has discussed the legal aspects, which is interesting, but hardly necessary, because c'mon, folks, this is America.
c'mon now, Joan, get out from behind those tears so you can see how much Ah love you.