Rasmussen's latest poll of the Senate race in Nevada shows incumbent Republican Dean Heller opening up a nine-point lead over Democratic congresswoman Shelley Berkley. Fifty-one percent of likely voters support Heller, with 42 percent choosing Berkley and only 5 percent undecided.
This survey shows a recent trend in Heller's direction, according to the RealClearPolitics average, which gives the Republican a 3.7-point lead overall.
Heller, who was appointed to the seat following the resignation of Republican John Ensign in 2011, was considered vulnerable in the western swing state. But Berkley has been dogged by an ethics investigation launched earlier this year in the House of Representatives. The seat is a must-keep for the GOP, which hopes to take control of the Senate in November.