Incumbent Democrat Senator Michael Bennet Hangs on in CO

In Tuesday night's race to watch, Colorado incumbent Democrat Senator Michael Bennet narrowly held onto his seat in the Democratic primary, beating back a challenge from political veteran and former state House Speaker Andrew Romanoff. President Obama had publicly endorsed Bennet, and the election was seen as an indicator of national sentiment toward the Washington establishment. On the Republican side, Tea-Party favorite Weld County District Attorney Ken Buck beat former Lt. Gov. Jane Norton. Meanwhile in Georgia, Secretary of State Karen Handel has conceded to former Rep. Nathan Deal in a race that was originally too close to call. The race had attracted headliners such as former Alaska Gov. Sarah Palin and former Massachusetts Gov. Mitt Romney, who supported Handel, and former Arkansas Gov. Mike Huckabee and former House Speaker Newt Gingrich in support of Deal.