Consumers may be "repelled" by any association with King and refuse to buy licensed products, according to the letter, which demands the image be removed by 9 a.m. PT on Wednesday.

The mother of "Success Kid" is threatening to sue Rep. Steve King for using her son's meme in his campaign fundraising efforts and claims people may be "repelled" by her son's perceived association with him. An attorney for Laney Marie Griner, who's son Sam Griner is pictured in the meme, on Monday sent a cease and desist letter to King (R-Iowa). She alleges the congressman is willfully infringing her copyright in the image and violating her son's likeness rights by using the meme in his fundraising efforts. "Not only have you falsely implied by your unauthorized use that 'Success Kid' is somehow associated with and supports your campaign, you have misrepresented to the general public that you are acting on behalf of and even have some proprietary interest in 'Success Kid' and Sam's image by emblazoning his photograph with the legend 'FUND OUR MEMES' in large red block letters," writes attorney Stephen D. Rothschild of King Holmes Paterno & Soriano in the letter.

Griner on Thursday posted a tweet about the campaign, calling him a "vile man" from "that disgusting party." Rothschild also argues King's campaign is violating the terms of fundraising platform WinRed, which prohibits content that violates copyrights and publicity rights. (Read the full letter below.)