 Complete the following phrase:  The 2016 Libertarian Party presidential primaries and caucuses allowed electors to indicate non-binding preferences for the Libertarian Partys 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 partys convention to select the partys nominee for the United States presidential election. The partys nominee for the 2016 presidential election was chosen directly by registered delegates at the 