After Sen. Jeff Bingaman (D-N.M.) announced his retirement last February, Republicans were bullish on their chances to take over this seat. However, the Land of Enchantment has become much more Democratic over the last decade, and Rep. Martin Heinrich (D-N.M.), the Democratic nominee, has held a sturdy single-digit lead over former Rep. Heather Wilson (R-N.M.) in the polls. The NRSC tellingly canceled its ads in the state, though other Republican-aligned outside groups, such as Crossroads GPS and the U.S. Chamber of Commerce, have still been airing ads against Heinrich, particularly on energy issues. A coalition of environmentalist and conservationist groups have been airing a barrage of negative ads against Wilson. The shifting demographics of New Mexico may be too much for Wilson to overcome to pull off the upset.