Answer:

ONEVOTE

Answer	Crossword Clue
ONEVOTE	An electoral share
ONEVOTE	Enough to swing an election.
ONEVOTE	Citizen's right

ONEVOTE	"One man, ..."
ONEVOTE	Each man's entitlement, per the saying
ONEVOTE	Each citizen's right, in a democracy
ONEVOTE	Slimmest election margin
ONEVOTE	What each person gets in an election