The Democratic Senatorial Campaign Committee — aiming for an Alaskan upset — has a new independent expenditure ad slamming Sen. Lisa Murkowski (R) as a Washington insider attending “fancy cocktail parties.”

The move is an attempt to help Democratic nominee Scott McAdams, in one of the most interesting races to watch Tuesday. Murkowski, a write-in candidate, lost the Republican nomination this summer to tea party favorite Joe Miller. Most polls show Murkowski in the lead, but Democrats are spending money in case they have a chance at scooping up the long GOP-held seat.

A Democratic source said the ad buy is between $150,000 and $200,000. The airwaves have been flooded in advance of the three-way contest, a close enough race that the party hopes to split Republican voters and clear a path for McAdams to win.

Of course, this ad could just as easily help Miller as it could boost McAdams.

“Lisa Murkowski has gone Washington,” the narrator states.

The ad attempts to paint Murkowski as an insider who supported adding to the deficit, Social Security privatization and the 2008 Wall Street bailout. Most Democrats backed the nearly $800 billion bailout signed by then-President George W. Bush, but Murkowski’s support for the measure was one reason Miller was able to win the close primary election. Sen. Bob Bennett (Utah) lost his party’s nomination at a Republican convention this summer for the same reason.

“Alaskans haven’t changed, but Lisa Murkowski sure has,” the DSCC ad concludes.