Sen. John McCain (R-Ariz.) appeared to heap more criticism on President Donald Trump during an interview on Sunday, saying it was “wrong” for high-income Americans to dodge the draft during the Vietnam War.

“One aspect of the conflict, by the way, that I will never ever countenance is that we drafted the lowest income level of America and the highest income level found a doctor that would say that they had a bone spur,” McCain said during a segment on the draft that aired on C-SPAN 3 on Sunday. “That is wrong. That is wrong. If we’re going to ask every American to serve, every American should serve.”

While the senator’s comments didn’t directly reference Trump, the president is widely known to have received five deferments from the draft during the Vietnam War, four for education and one for bone spurs in his heels.

The New York Times obtained the president’s Selective Service records last August, and during an interview at the time Trump said the spurs had been “temporary” and “minor” and that over time, they “healed up.”

“They were spurs,” he told the outlet, although he noted that they were “enough of a problem.” He continued: “You know, it was difficult from the long-term walking standpoint.”