Brown has done everything he can to nationalize the campaign — becoming the first Senate candidate to run an ad on immigration and the border crisis. He has also hit Shaheen over Islamic State terrorism and pushed her to call for a travel ban to contain Ebola.
http://www.politico.com/story/2014/10/scott-brown-jeanne-shaheen-senate-new-hampshire-elections-112086.html?hp=t1_3
