While Nevada only represents six electoral votes, and the winner of New Hampshire will only capture four, the states could play a crucial role in what is expected to be a photo finish. The president has been marginally favored in both races to date; Romney has not led in a poll of Nevada since April, while the RealClearPolitics average of polls gives the president a 1.4 percent lead in Nevada.

But the ARG polls are both worse than the president's showing in other recent state-level polls in the two swing states, and indication Obama may not yet have fully halted Romney's momentum.

The polls each carried a margin of error of 4 percentage points.