During an appearance on The Ellen DeGeneres Show, House Minority Leader Nancy Pelosi called the booing of a gay service member during last week's GOP presidential debate “unthinkable.”

During the televised Fox News/Google debate, presidential candidate Rick Santorum answered a question submitted by Stephen Hill, a gay soldier serving in Iraq.

Referring to the recent repeal of “Don't Ask, Don't Tell,” Hill, dressed in an Army t-shirt, asked via a YouTube clip: “Do you intend to circumvent the progress that has been made for gay and lesbian soldiers in the military?”

The audience booed Hill's question, but cheered Santorum when he called DADT repeal a “tragic social experiment” and vowed he would reinstate the policy, if elected president.

Pelosi told host Ellen DeGeneres that the “jeering” was “unthinkable.”

“It's unthinkable … that none of the people who would be president, would be commander in chief, call a halt, make a statement right then and there, that that was totally unacceptable in our country,” she said. (The video is embedded in the right panel of this page.)

(Related: Obama says GOP booing of gay soldier “not who we are.”)