The field for the 2016 Republican presidential nomination is as flat as any in modern memory—pretty remarkable for a party that usually has a fight but almost invariably ends up nominating whoever's turn it is. While nomination trial-heat polling tells us very little this early, there are some poll questions that are better measurements of at least where these candidates are starting out, before the campaigning, debates, and advertising begin in earnest. An April 26 to April 30 NBC News / Wall Street Journal poll asked Republican primary voters whether they could or could not see themselves voting for each of 10 different potential candidates. Marco Rubio topped the list, with 74 percent saying they could see themselves supporting him. Second was Jeb Bush with 70 percent; Scott Walker was third with 61 percent; Rand Paul was fourth at 59 percent; Ted Cruz was fifth at 57 percent; and Mike Huckabee was sixth with 52 percent. So six candidates had more than half of GOP primary voters open to voting for them. (Rick Perry, Ben Carson, Chris Christie, and Carly Fiorina rounded

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