(CNN) - A new 30-second spot by the Democratic Senatorial Campaign Committee went up Saturday in Alaska going after Republican Sen. Lisa Murkowski as someone who has "gone Washington."
"Maybe it was the fancy cocktail parties or all those pretty monuments," the narrator says. "Whatever the reason, Lisa Murkowski has gone Washington."
The ad attacks Murkowski's votes in the Senate, including those over Social Security and the Wall Street bailout, and says she's "turned her back on us once and for all."
Murkowski lost the GOP primary earlier this year to Tea Party-backed candidate Joe Miller - who also received endorsement from Sarah Palin - and then decided to run as a write-in independent candidate. They both will face Democratic nominee Scott McAdams in the November election, and the new ad is a sign that Murkowski is doing well.
Her campaign responded to the spot and said she will continue to use her role in the Senate to keep the economy strong.
"Lisa Murkowski has clearly emerged as a candidate with the momentum heading into the final days of the election," Murkowski campaign spokesman Steve Wackowski said in an email to CNN. "In this situation a D.C. group organized and funded by political insiders has the audacity to refer to themselves in the first person as if implying they are Alaskans."
Recent polling shows Murkowski and Miller in a deadlocked race with McAdams in third place.
– Follow Gabriella Schwarz on Twitter: @schwarzgcnn