He's the state senator being harassed by the Wisconsin pro-public sector union protestors as he tried to enter the capitol to do his job (see previous post).
From today's Wiscosin State Journal:
"Grothman appears to have taken the whole incident in stride. His view of the protesters is that they're mainly university students having fun and 'sleeping on air mattresses with their girlfriends.'
'I really think five years from now most of these people will have a real job and be voting Republican,' Grothman said."