The Federalist notes (http://thefederalist.com/2016/02/11/times-barack-obama-rhetoric-made-politics-more-civil/) 14 times the President made politics less civil. 14 does not seem like it would cover all of the instances.
The Federalist notes (http://thefederalist.com/2016/02/11/times-barack-obama-rhetoric-made-politics-more-civil/) 14 times the President made politics less civil. 14 does not seem like it would cover all of the instances.