Wisconsin does not require voter registration by party and voters can register to vote at the polls on election day. Voters may cast a ballot for one party only.

Tuesday 5 April 2016: Wisconsin Primary. Hours 7:00a-8:00p CDT (1200-0100 UTC). Delegate Pledging: Proportional Primary. Voter Eligibility: Open Primary.

Tuesday 5 April 2016: 86 of 96 delegates to the Democratic National Convention are pledged to presidential contenders based on the results of the voting in today's Wisconsin Presidential Primary. A mandatory 15 percent threshold is required in order for a presidential contender to be pledged National Convention delegates at either the congressional district or statewide level. How the Democratic Proportional Delegate Allocation Math works.

57 district delegates are to be pledged proportionally to presidential contenders based on the primary results in each of the State's 8 congressional districts.

In addition, 29 delegates are to be pledged to presidential contenders based on the primary vote statewide. 19 at-large National Convention delegates 10 Pledged PLEOs

