The Quinnipiac University Poll recently looked at three states that are considered by many to be "swing states" in the 2016 election -- Colorado, Iowa, and Virginia. The GOP starts off behind the Democrats in blue state/red state electoral votes by a significant margin, which means these are three states that the Republicans really need to win to have a chance in the 2016 election.
And the results were mixed for the GOP. For instance, Paul seems to be doing OK in Colorado and Virginia, but does poorly in Iowa. Bush does well in Virginia, but not so good in Iowa and Colorado. Walker does fairly well in Colorado, but not so well in Iowa and Virginia. And Huckabee and Christie trail in all three states.
If the election was held today, I believe Hillary Clinton would easily be elected president. There's still a long time before the 2016 election, but the Republicans have a long way to go to catch up with Clinton (and will probably damage each other in the primary campaign next year, while Clinton will sail through the primaries virtually unscathed).
In Colorado, 1,049 registered voters were questioned between February 5th and 15th, and the survey has a margin of error of 3 points.
In Iowa, 1,089 registered voters were questioned between February 5th and 15th, and the survey has a margin of error of 3 points.
In Virginia, 1,074 registered voters were questioned between February 5th and 15th, and the survey has a margin of error of 3 points.