Thu, 08/08/2024 - 12:10 Tech Insider From left: Jim Gaffigan, Tim Walz, and Jim O'Heir.Kristina Bumphrey/Variety via Getty Images; Tom Williams/CQ-Roll Call, Inc via Getty Images; Tom Cooper/Getty Images for SeriesFest Tags Entertainment, saturday-night-live, steve-martin, tim-walz, life-homepage Source Steve Martin turned down playing Tim Walz on 'Saturday Night Live.' Here are 7 …