2012 United States presidential election in Nevada
State voters chose six electors to represent them in the Electoral College via a popular vote pitting incumbent Democratic President Barack Obama and his running mate , Vice President Joe Biden , against Republican challenger and former Massachusetts Governor Mitt Romney and his running mate , Congressman Paul Ryan . 
<triplet> Democratic <subj> Republican <obj> opposite of <triplet> President <subj> Vice President <obj> substitute/deputy/replacement of office/officeholder <triplet> Barack Obama <subj> Democratic <obj> member of political party <subj> President <obj> position held <triplet> Joe Biden <subj> Democratic <obj> member of political party <subj> Vice President <obj> position held <triplet> Republican <subj> Democratic <obj> opposite of <triplet> Mitt Romney <subj> Republican <obj> member of political party <subj> Massachusetts Governor <obj> position held <triplet> Paul Ryan <subj> Republican <obj> member of political party