There is a red and blue political divide in the U.S. that this election is only exacerbating, with consequences for governing.
Presidential campaigns are about choices, differences, especially between the parties. The 2016 divide between Republicans and Democrats is more intense and polarizing than usual.
Two of the leading contenders, Sen. Ted Cruz, on the Republican side, and Sen. Bernie Sanders, who is seeking the Democratic nomination, openly declare that this is a "base" election focused more on bringing out hard-core committed supporters than on trying to persuade more independent-minded folks. Their impressive showings in the Iowa Caucuses -- Cruz won, and Sanders almost did -- reinforce that. And among billionaire Donald Trump's attributes, political consensus-building isn't at the top of the list.
Even after the New Hampshire primary this week winnows the field, Hillary Clinton will still be the favorite to win the Democratic nomination, and Marco Rubio will be one of the three or four Republican finalists.