Coloradoís 3rd district was also considered a tossup in a reprise of the 2006 race for the seat between Rep. John Salazar and Scott Tipton. Salazar crushed the Republican in 2006, winning the election by 25 percent. But the tables turned this year, with Tipton beating the Democratic lawmaker, who was trying for his fourth term, by 5 points.
Of the regionís competitive races, Coloradoís 4th district was won by the widest margin. Freshman Democratic Rep. Betsy Markey lost the seat to GOP candidate Cory Gardner by 13 points. The district is a mixture of liberal and conservative voters, thanks to cities such as Fort Collins and Greeley and vast expanses of rural areas spanning the eastern side of the state.