Sen. Rand Paul (R-Ky.) said he would put a hold on the nomination of James Comey, President Obama’s pick to head the Federal Bureau of Investigation, until the administration answers his questions on domestic drone use.

“I’m placing a hold on it, not because I have the intention of ultimately defeating him, but I’m going to slow it down enough to see if the administration would respond to my questions,” Paul said Tuesday on Fox News.

Paul said he submitted about 15 questions nearly a month ago to the FBI about its domestic drone policies but hasn’t received a response.

“I want to know when the FBI uses a drone to fly over my property or someone’s house, are they getting a warrant first or are they just doing it willy-nilly because they can?,” he asked. “The thing about a drone is it has amazing ability to look everywhere from 50,000 feet so you don’t know you’re being spied upon. And I think that that kind of spying goes against the right to privacy that all Americans have.”