The month of April brought several strong performances for Cruz . He capitalized on a weak ground game in the Donald Trump campaign to win the conventions in North Dakota and Colorado , despite criticism from Donald Trump . In addition , Ted Cruz won the valuable Wisconsin primary and with it 36 of the state 's 42 delegates . Many considered the probability of a " contested " Republican National Convention as it was considered doubtful that Trump would receive the requisite 1,237 delegates
Republican National Convention
2016 Republican National Convention
2016 New York Republican primary