A super PAC affiliated with the fiscally conservative Club for Growth is dropping $4 million on a new ad campaign to boost Republican Senate candidate Sam Brown in Nevada.

Win It Back PAC began airing its first Nevada ad Friday as part of an ad buy that will run through the month of August. 

The ad, titled “Six Years,” opens with a clip of a Sen. Jacky Rosen (D-NV) ad in which she says she has put Nevada’s interest over her party’s, before pivoting to attack Rosen on how often she votes with President Joe Biden’s position and on rising costs.

Club for Growth’s ad comes at a pivotal moment in the Senate advertising battle in Nevada, where Democrats have so far outspent Republicans by nearly $40 million in past and future advertising. Outside of the new ad buy, Republican-aligned groups only have $66,000 worth of ads airing in the Senate race this week, according to data from ad-tracking firm AdImpact. Democratic groups, led by the advertising arm of Democratic leadership-aligned Senate Majority PAC, have spent $2.1 million.

Republican-aligned outside groups and Brown’s campaign (excluding Club for Growth) have made about $13.5 million in future ad reservations for the Nevada Senate race, compared to $47.3 million for Democratic-aliged groups and Rosen’s campaign. 

The ad attacks Rosen as having voted with Biden “99 percent of the time,” citing a Fox News article analyzing Rosen’s 2023 votes. 

That number fluctuates depending on the year and the vote. From 2021 to 2022, when Democrats had full control of Congress, Rosen voted with Biden’s position 93 percent of the time. In 2023, while she did vote with Biden nearly 99 percent of the time, she again stood at 93 percent when nomination votes were not counted.

The ad then details how the rising price of gas and eggs across the U.S. and housing in Nevada since January 2021 when Biden took office. And it accuses Rosen of sending stimulus checks to “illegal aliens” — a reference to the 2021 American Rescue Plan, which sent $1,400 checks to qualifying people with Social Security numbers. Most undocumented immigrants were therefore ineligible, though people who overstayed their visas would have been eligible. 

“They got your money, we got higher prices, and Jacky Rosen should get a pink slip,” the ad concludes.

Nevada is not the only Senate race where Club for Growth Action, funded through significant support from right-wing billionaires Jeff Yass and Richard Uihlein, is getting involved. The group cut an ad targeting Rep. Ruben Gallego (D-AZ) in Arizona’s Senate race last week.

In 2022, a Club for Growth-aligned Super PAC spent more than $12.2 million in Nevada’s Senate race, according to OpenSecrets.