Question:
Which political party did Vermin Supreme belong to in Jun, 2015?

Context:
 Vermin Supreme is a member of the Libertarian Party from Jan, 2016 to Dec, 2022. 
 Vermin Supreme is a member of the Republican Party from Jan, 2008 to Jan, 2012. 
 Vermin Supreme is a member of the Democratic Party from Jan, 2012 to Jan, 2016.

Answer:
Democratic Party