WASHINGTON (AP) — Republican presidential candidate Herman Cain said Sunday that he should not have stayed silent after the audience at a GOP debate booed a gay soldier serving in Iraq.

The Georgia businessman told ABC’s “This Week” that it would have been “appropriate” for him to have defended the soldier. None of the candidates on stage at the Sept. 22 forum responded to the boos.

“In retrospect, because of the controversy it has created and because of the different interpretations that it could have had, yes, that probably — that would have been appropriate,” Cain said, when asked if he should have asked the audience to respect the soldier.

Cain said it wasn’t immediately clear to him what had drawn the audience’s scorn, adding, “I happen to think that maybe they were booing the whole ‘don’t ask, don’t tell’ repeal more so than booing that soldier.”

The so-called don’t ask, don’t tell policy barring gays from serving openly in the military was officially lifted last month.

Cain’s remarks came after President Barack Obama on Saturday chastised the GOP candidates at the debate, saying one of the duties of the nation’s commander in chief is to stand up for Americans in uniform.