Opponents of Donald Trump are using his eminent domain background to attack Trump. As NPR recently reported “Republicans eager to blunt Donald Trump’s front-runner status in the GOP presidential primary think they’ve found the issue that will finally sink the billionaire’s White House hopes: eminent domain.”

A recent ad by the Club for Growth proclaims “Trump supports eminent domain abuse. He can make millions, while we lose our property rights.” This ad is being aired in Iowa. According to the ad, Trump responded to the Supreme Court’s controversial decision in Kelo, by saying, “I happen to agree with it 100 percent.”

Trump is also being criticized again for a case in which a woman’s home was taken in Atlantic City for a project involving one of his casinos. “This guy’s a bully,” says David Boaz, executive vice president of the Cato Institute, a prominent anti eminent domain group. “Using the power of government to take a widow’s property is pretty much the definition of a bully.”