A true Machiavellian would vote Romney for President and vote for Democrats for Senate/Congress.
The powers that be have so dumbed down our society and been successful at keeping the masses ignorant, one does not have to be Machiavellian.
People in my own local republican party (many of whom I would consider good people) are just woefully ignorant of history and the plan of the leftists. They really do not see evil for what it is.