Party person (8)
(Other definitions for voter that I've seen before include "Election participant" , "supporter of politician" , "Lively dances (esp. Irish)" , "one making sign of the cross" , "One exercising the ballot" .)
(Other definitions for politico that I've seen before include "Person with party views (colloq.)" , "Eg, an MP" , "statesman" , "Party man" , "Parliamentary member" .)