Though the high-profile political season has gifted Saturday Night Live with some killer ratings, it apparently hasn't floated all sketch comedy boats. Rumors started circulating today that Fox's MADtv was canceled in the middle of its fourteenth season, so Defamer checked in with one of our operatives to get the scoop:"It's true," said the highly-placed source. "We're finishing out the season, then we're done." Fox had been experimenting with potential MADtv replacements over the last few years, though none of its hush-hush, taped pilots ever made it to series. We're hearing, though, that the network has currently decided to keep its other late-night offering, Talk Show with Spike Feresten. Developing!