Republican support for Trump is 30% and the number of Republicans is about 1/3 of the US voting population.
I'm not sure how you can make an argument that Republican voters are any sort of minority in the US; Currently Republicans make up majorities in the house of Representatives AND the Senate AND Have control of 31 State legislatures, while Democrats only Control 11. There are 32 states with republican governors, and only 17 with Democratic governors.
Historically, there have been 18 republican presidents, and only 15 Democrat ones, Despite the fact that the Democrat party is older by 26 Years.
Edited 12/11/2015 18:12:48