Unlike caucuses, primaries are conducted during unchanging polling stations, customarily paid for by a state and run by state choosing officials. Voters generally expel a tip list for their elite candidate.
Generally, there are dual forms of primaries: closed, in that usually electorate purebred with a celebration holding a primary can participate; and open, in that electorate are not compulsory to be purebred with a celebration holding a primary.
Prior to a 1970s, a infancy of states chose their representatives regulating caucuses, though after reforms were instituted in 1972 to make a assignment routine some-more thorough and pure many states adopted primaries.
In 2016, only fourteen states (Alaska, Colorado, Hawaii, Idaho, Iowa, Kansas, Kentucky, Maine, Minnesota, Nebraska, Nevada, North Dakota, Washington, and Wyoming), a District of Columbia, and 4 U.S. territories (American Samoa, Northern Marianas, Puerto Rico, and a U.S. Virgin Islands) reason caucuses.