Complex sentence: In March 2012, Calvo endorsed Mitt Romney for president, and in January 2016 he endorsed Texas Senator Ted Cruz for president, but later endorsed to Donald Trump after Cruz and Kasich withdrew the campaign.
Split into simpler sentences: In March 2012, Calvo endorsed Mitt Romney for president. In January 2016 he endorsed Texas Senator Ted Cruz for president, and he later endorsed Donald Trump after Cruz withdrew the campaign.