Ted Cruz won the Wisconsin Republican primary on Tuesday April 5th. This moved him one step closer to the historic contested convention. Meanwhile, Bernie Sanders won the Democratic primary giving him his sixth win in the past seven state contests.

Cruz's victory complicates things for Trump's run toward the 1,237 pledged delegates that he needs to get the Republican nomination before the Cleveland convention. This follows a rough week for Trump on the campaign, including his missteps on abortion and controversial comments on national security.

Pledged delegates are elected or chosen at the state or local level, with the understanding that they will support a particular candidate at the convention. Pledged delegates are not actually bound to vote for that candidate, so the candidates are allowed to periodically review the list of delegates and eliminate any that they think are no longer supportive. For the Republican party there are a total of 2,472 delegates (most are pledged delegates). To become the Republican Party nominee the candidate MUST win a majority of 1,237 of the 2,472 total delegates at the Republican National Convention. The Republican National Convention is the convention held to nominate an official candidate in the upcoming presidential election.

Cruz declared in Milwaukee that he is convinced that his campaign will get the 1,237 pledged delegates either before or at the convention in Cleveland. Cruz's Wisconsin win got him at least 36 delegates compared to the 6 that went to Trump. The delegate race is now at 746 pledged delegates for Trump, 510 for Cruz, and 145 for Kasich.

As the campaign approaches the Northeast states, things are getting heated. The Northeast tends to favor Trump, however, he would need to win 60 percent of the remaining pledged delegates to win the nomination. Cruz only has a small mathematical chance of winning the nomination since many of the states voting before the end of April will most likely favor Trump. Kasich, who has won only one state, cannot reach the magic number in the remaining contests.