In the presidential battleground state of Iowa, Clinton is tied with Sen. Rand Paul, R-Ky. (45 percent to 45 percent), and leads New Jersey Gov. Chris Christie by just 1 point (44 percent to 43 percent).

She holds larger leads against former Florida Gov. Jeb Bush (46 percent to 42 percent), Sen. Marco Rubio, R-Fla., (49 percent to 40 percent), Sen. Ted. Cruz, R-Texas, (49 percent to 37 percent) and Wisconsin Gov. Scott Walker (50 percent to 37 percent).

In hypothetical general-election match ups in New Hampshire, Clinton is ahead of Paul by 3 points (46 percent to 43 percent), Christie and Bush by 5 points (47 percent to 42 percent), Walker by 9 points (48 percent to 39 percent) and Cruz by 13 (51 percent to 38 percent).