Infighting Over Iran Nuclear Deal Creates Headaches For the GOP Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email Senate Majority Leader Mitch McConnell, R-Ky., left, speaks with Sen. Tom Cotton, R-Ark., as they leave the Senate floor. ( Bill Clark / Getty ) Produced by PRI and WNYC