THE VP DEBATE
''It probably will just be an imitation of Tina Fey,'' admits Hannigan, before slipping on her Sarah Palin suit. For Segel, this role is a culmination of a lifelong dream: ''Ever since I was a kid, I always imagined someday I'd get to play Joe Biden in a photo shoot.''
'How I Met Your Mother' airs on Mondays at 8:30 p.m. on CBS
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