A show of political art at Arizona State University focuses on presidential democracy. But Richard Nilsen writes that it’s difficult for contemporary art to not be partisan. And is that bad? “It raises in important question about politics and art: Can they be reconciled? Politics is about answers; art is about questions. Politics is about taking sides; art is about ambiguity. Politics is about making a commitment; art is about exploring all the options. Politics values simplicity; art values complexity. And, worse for the sake of visual art, politics is about words; art is about things.”