If you're planning on heading out to cast your ballot in the primary election on Tuesday in the city of Port Huron, City Clerk Sue Child says you might be in for a change at your polling place.  If you vote at Holland Woods voting will be taking place in the cafeteria.  Precinct 3 voters need to go to the McKinley building on Riverside Drive for this election.  And at Roosevelt Elementary, the voting machines will be in room 114.  The changes are due to improvements going on at various Port Huron Area School District buildings this summer.