Record number of candidates
Donald Trump became presumptive nominee on May 4, 2016
Ben Carson suspended campaign on March 4, 2016
Contentious debates
Donald Trump won New Hampshire primary
Jeb Bush suspended campaign on February 20, 2016
John Kasich suspended campaign on May 4, 2016
John Kasich won Ohio primary
Marco Rubio suspended campaign on March 15, 2016
Marco Rubio won Minnesota caucuses
Rise of outsider candidates
Super Tuesday held on March 1, 2016
Ted Cruz suspended campaign on May 3, 2016
Ted Cruz won Iowa caucuses