Hillary Clinton spells out the only acceptable policy — and the president’s responsibility.

“As a matter of policy, it cannot be American policy, period,” Ms. Clinton replied. Such “hypotheticals,” she added, “are very dangerous because they open a great big hole in what should be an attitude that our country and our president takes toward the appropriate treatment of everyone. And I think it’s dangerous to go down this path.”

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What’s clear is that torture-when-convenient cannot be U.S. policy. It’s to the credit of Ms. Clinton and her Democratic colleagues that they seem to understand what the Republicans, save Mr. McCain, do not.