A pair of progressive outside groups are targeting Wisconsin Gov. Scott Walker ahead of the formal launch of his presidential campaign, suggesting the Republican is a "puppet" for the Koch brothers.

The Agenda Project Action Fund and American Family Voices launched an ad against Walker on Monday, in what the groups are calling the first step in a larger campaign that will focus on the Republican's ties Charles and David Koch, as well as "paint Walker as a bought and paid for puppet of the GOP mega-donors."

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The Agenda Project Action Fund said that the 30-second ad will air in Iowa, considered a must-win state for Walker, and Washington, D.C. The group, which is known for making controversial ads targeting Republicans, also released an "uncensored web version."

The ad, entitled "Puppet for President," features headlines from PR Watch, Bloomberg and The New York Post that tie Walker to the Kochs. It also includes a puppet, which is supposed to represent in the Republican governor, waving and holding a wad of money in the background.

The groups also launched a website with a message from "the puppet."