LITMUS TESTS

Opposing the Iran deal is becoming a litmus test for 2016 GOP candidates

http://talkingpointsmemo.com/edblog/the-emerging-gop-war-platform

http://www.washingtonpost.com/blogs/plum-line/wp/2015/04/03/republican-voters-want-a-president-who-will-oppose-climate-action-immigration-reform-iran-nuke-deal/
 
Rand Paul clams up: http://www.dailykos.com/story/2015/04/03/1375359/