see more

Representative Kenneth 'Ken' Buck, a Republican from Colorado, speaks during the Colorado Republican State Convention in Colorado Springs, Colorado, U.S., on Saturday, April 9, 2016. For the first time in 40 years, a presidential candidate will appear at Colorado's Republican Assembly, a sign of how arcane and obscure rules governing delegates in some states may lead the party to a contested national convention in July. Photographer: Matthew Staver/Bloomberg via Getty Images

Representative Kenneth 'Ken' Buck, a Republican from Colorado, speaks during the Colorado Republican State Convention in Colorado Springs, Colorado, U.S., on Saturday, April 9, 2016. For the first time in 40 years, a presidential candidate will appear at Colorado's Republican Assembly, a sign of how arcane and obscure rules governing delegates in some states may lead the party to a contested national convention in July. Photographer: Matthew Staver/Bloomberg via Getty Images