The latest on the presidential horse race.

2014 Senate Polls Update: Kentucky, North Carolina, Iowa, Colorado, Arkansas

North Carolina: NBC News/Marist

  • Hagan (D): 43
  • Tillis (R): 43
  • Haugh (L): 7

Colorado: Rasmussen

  • Gardner (R): 51
  • Udall (D): 45

Kentucky: Rasmussen

  • McConnell (R): 52
  • Grimes (D): 44

Iowa: NBC News/Marist

  • Ernst (R): 49
  • Braley (D): 46

Arkansas: Rasmussen

  • Cotton (R): 47
  • Pryor (D): 44

With Election Day just a week away, we are now in crunch time. This week, voters all around the country will have to endure a flurry of negative campaign ads everywhere they look as candidates make one last push to win over undecided voters. Let’s take a look at who’s pulling ahead and who needs all the help they can get in the final week of a long campaign.

In North Carolina, we have mostly been tracking head-to-head polls between incumbent Democrat Kay Hagan and Republican Thom Tillis. A new NBC News poll and a HighPoint/Survey USA poll, however, suggest that libertarian candidate Sean Haugh could pull in 5-7 percent of the vote which certainly has big ramifications in this close race. Both polls have Hagan and Tillis tied while two earlier CBS News/NY Times and PPP polls have Hagan up by 3. Hagan remains a very slight favorite in this one.

In Colorado, incumbent Democrat Mark Udall has fallen behind badly after leading the race for most of the year. Udall led nearly every poll out of the state until September. Since September, Republican Cory Gardner has led 14 of the last 16 polls and RealClearPolitics has Gardner up by an average of 47-44. A new Rasmussen poll has Gardner leading by 6.

In Kentucky, Democrat Alison Grimes has flirted with the lead but Republican incumbent Mitch McConnell has proven too well-funded and well-known. McConnell leads Grimes by an average of 46-42, according to RCP, and leads Grimes by 8 percent in the latest Rasmussen poll.

The race in Iowa remains tight but Republican Joni Ernst has certainly established herself as a slight favorite over Democrat Bruce Braley. Braley has not led any poll since September and the latest NBC News poll has Ernst up by 3 percent. RCP has Ernst up by an average of 47-45.

In Arkansas, Republican Tom Cotton appears to be headed for a win over Democratic incumbent Mark Pryor. Cotton has led all but two polls since May and RCP has him up by an average of 47-42. The latest Rasmussen poll has Cotton leading by 3 percent while other polls have him leading by as much as 7-8 points.