This combination of photos shows supporters of Democratic presidential candidate Hillary Clinton in Tempe, Ariz., on Wednesday, Nov. 2, 2016, and supporters of Republican presidential candidate Donald Trump in Baton Rouge, La., on Thursday, Feb. 11, 2016. Voters' intense negative feelings about Trump and Clinton may say as much about the times as the candidates, says David Greenberg, a professor of history at Rutgers University and author of "Republic of Spin: An Inside History of the American Presidency." "There’s something about the polarized climate that we’re in that leads us to feel these things more strongly, to regard the opposition with such hostility, to talk in terms of threats to the Republic, to say 'Lock her up,' in ways we wouldn't have 30 years ago." (AP Photo/Ross D. Franklin, Gerald Herbert)