Caucuses were once the norm, requiring more time and effort than merely casting a vote in a polling place. On the Democratic side, only Iowa and three other states -- Nevada, North Dakota and Wyoming -- will hold caucuses rather than primaries this year. And Republicans have canceled caucuses in many states as part of an effort to clear Trump’s path to re-nomination. Since 1972, only three presidents have won both the Iowa caucuses and the presidency: Jimmy Carter, George W. Bush and Barack Obama. John McCain is the exception that proves the rule — he finished a close fourth in Iowa and won the nomination in 2008.

Source: Washington Post January 26, 2020 05:48 UTC