Over the course of just a few days last week, Tom Cotton (R-Ark.) went from relatively anonymous freshman senator to what seemed like the tip of every tongue in Washington -- thanks to the letter he wrote and got 46 fellow Republicans to join, warning the ruling Iranian regime to be wary of negotiating a nuclear deal with President Obama. http://www.washingtonpost.com/blogs/post-politics/wp/2015/03/18/tom-cotton-calls-for-global-military-dominance-in-maiden-senate-speech/