“The Definitely Not Coordinating with Stephen Colbert Super PAC,” now led by The Daily Show's Jon Stewart, is trying hard to prove that they are definitely not coordinating with The Colbert Report host and possible presidential candidate (!) Stephen Colbert. Enter The Mountaintop star Samuel L. Jackson. The man with the sharpest tongue on Broadway provides the voiceover for a TV spot that attacks (who else?) Colbert. “Why is the T in his name silent?” asks Jackson in the ad released by Colbert’s “Americans for a Better Tomorrow, Tomorrow” PAC. “What else is he hiding? Letting murderers out of jail? Enough is enough!," rants Jackson. "I have had it with these money-grubbing Super PACs messing with our money to buy the elections!” Check out the hilarious clip below... today, not tomorrow.