“I hear you called me out today. If you’re so confident, let’s debate the Constitution.” That tweeted throw-down directed at the Iranian foreign minister by Senator Tom Cotton is an example of the wave of 140 character assassination that’s sweeping the political world. In WaPo, Professor Daniel W. Drezner explains how trolling could become the new international language of diplomacy. (Makes sense, it’s the new international language of everything else.)

+ And apparently, Barack Obama doesn’t want to miss out on the action, because he just joined Twitter.