2016 Libertarian Party presidential primaries

The 2016 Libertarian Party presidential primaries and caucuses allowed electors to indicate non-binding preferences for the Libertarian Party's presidential candidate. These differed from the Republican or Democratic presidential primaries and caucuses in that they did not appoint delegates to represent a candidate at the party's convention to select the party's nominee for the United States presidential election.

Source: Wikipedia — 2016 Libertarian Party presidential primaries (CC BY-SA 4.0)