A Democratic super PAC that was a key backer of the Barack Obama and Hillary Clinton campaigns is launching an ad blitz against Republican gubernatorial primary frontrunner Adam Laxalt.

The six-figure digital campaign from the Nevada affiliate of Priorities USA Action will run for 10 weeks and feature ads on Facebook, YouTube, Pandora, Google search and banners on websites. It will direct voters to a site called AdamLaxaltRevealed.com, which criticizes the Nevada attorney general for being “donor owned and operated.”

“At a time when Donald Trump and congressional Republicans are already bowing to the interests of billionaires and big corporations, Nevadans don’t need a governor who will be just another voice for the very rich,” said Guy Cecil, chairman of Priorities USA Action, in a statement.

The site points to Laxalt’s desire to repeal the Commerce Tax, which levies a tax between 0.051 percent to 0.331 percent on entities making more than $4 million a year. The site says Laxalt wants to “fund huge tax cuts for big businesses by taking millions away from Nevada schools.” It also criticizes him for opposing water and air pollution regulations and says that after taking contributions from pharmaceutical companies such as Pfizer, he “went easy on them in a lawsuit over hidden drug prices.”

Laxalt’s campaign urged supporters in an email on Friday to send him an “emergency contribution” to counter the attack.

“The radical left is afraid because they know we have thousands of committed supporters like you on Team Laxalt,” the solicitation said. “The LAST thing we need is Hillary’s corrupt political machine telling us how to run our state!”

Priorities USA Action plans to spend $50 million on digital ads supporting Democrats in gubernatorial, House, Senate and state legislative races across the country. A recent Nevada Independent poll shows Laxalt is far ahead of his Republican primary opponents in the race to replace termed-out Gov. Brian Sandoval, and he is a strong contender against the two leading Democratic gubernatorial candidates.