One more time, for old times' sake. If old times are 2008, this week, or the next two years of nonstop election coverage that undoubtedly will give way too much media attention to reality TV star Sarah Palin.

So last night on Late Show with David Letterman, guest Tina Fey tried to remember how she pulled her Palin impersonation together for SNL. Neither Fey nor Letterman, however, has a valid explanation for why Palin continues to be a thing.

Roll the clip!