Mick Jagger made a joke about President Obama at the Rolling Stones’ D.C. tour stop, shedding light on the recent NSA surveillance program scandal made public by Edward Snowden.

On Monday night, the band was performing in the nation’s capital when Jagger made the comment. Conservatives were quick to take to Twitter to pass it along.

"I don't think President Obama is here, but I'm sure he's listening in," he said, which Sen. Rand Paul (R-Ky.) tweeted on Tuesday morning, The Huffington Post reports.

One concert-goer even tweeted, “Yes, the weed-smoking ex-hippie generation here at Verizon Center collectively booed audibly when Mick Jagger first said, ‘President Obama,’” Fox News reports.

President Obama has been revealed as a big Jagger fan in the biography Barack Obama: The Story, with writer David Maraniss saying "He could do the walk, the strut, the face.” They even sang together at a White House event in celebration of the blues.

Jagger has been making it clear that he’s a conservative with recent comments.