A poll of New Hampshire voters from Purple Strategies shows how the various potential presidential candidates are faring two years before the traditional first primary. But of more immediate concern is the 2014 race for the U.S. Senate there, where Democrat incumbent Jeanne Shaheen is tied at 44 percent support with a potential Republican challenger, former Massachusetts senator Scott Brown.

Brown, who has not entered the race but has moved to New Hampshire, leads Shaheen among independents, 48 percent to 39 percent, and among men, 51 percent to 40 percent. Shaheen, meanwhile, leads among women, 46 percent to 38 percent. Among those polled, 43 percent identified as independents, while Democrats and Republicans were evenly split at 27 percent.