The comedian reveals he actually based the impersonation on his brother, Mitch Maya Rudolph as Kamala Harris and Jim Gaffigan as Tim Walz on "Saturday Night Live" (CREDIT: NBC) Jim Gaffigan revealed on Monday that he only got the “Saturday Night Live” gig of playing Tim Walz after his manager lied to the show’s booker that he already had his impersonation of the Democratic VP candidate down. “I get a call from my manager and he’s like, ‘Hey, so we’ve been telling the booker at ‘SNL’ that you’ve