Should I be laughing at Rob Lowe's performance?

From what I've seen in these commercials, it looks like Rob Lowe's just trying to do an impression of Drew Peterson. It almost looks like he's doing a skit from Saturday Night Live. Plus, what casting agent really thought Rob Lowe would be good for this role? The two don't look anything a like. I know makeup helps, but casting an actor with a similar physique would have been better. Rob Lowe is too boyish, even for his age now. The guy is ageless. Drew Peterson, however, is chubby and looks like the Lion from Wizard of Oz. Come to think of it, John Goodman could have played this role. He lost a lot of weight, but he is still chubby enough to resemble Drew Peterson. But Rob Lowe? lol.