Republicans often try to out do each other on how tough they would be on ISIS, and of course the presidential election is no exception. One way is by voicing support for torture techniques like waterboarding and sexual humiliation.

Current GOP frontrunner Donald Trump not only wants to bring back waterboarding but says, “even if it doesn’t work, they deserve it.”

In 2009, the Obama administration banned these and other techniques under an executive order, codified into law last year with an amendment to the National Defense Authorization Act. The amendment, by Senator John McCain (R-Ariz.), passed 78-21.

Rand Paul and Ted Cruz voted for it. Marco Rubio didn’t vote (he has a habit of this) but he says he would’ve voted no.

However, Rubio views are close to the Republican norm on torture, at least among the GOP presidential field. Nearly all other candidates, except for Cruz and Paul, have come out for waterboarding and other torture techniques.

Politico has more on the Republican divide on torture:

“If we capture any of them alive, they are getting a one-way ticket to Guantánamo Bay, Cuba, and we are going to find out everything they know,” Rubio said at the most recent GOP debate, on Jan. 14. Rubio did not elaborate on what methods he would approve to do that, and his campaign did not respond to an inquiry. “We should do whatever we need to do to get actionable intelligence that’s within the Constitution,” Christie said on MSNBC last month. Asked whether waterboarding amounts to torture, Christie replied: “I don’t believe so.” He complained that Obama’s actions had “demean[ed]” intelligence officers, adding: “These are people doing a dangerous job in a dirty world, and we need to support them because they are the first line of defense between us and ISIS, between us and Al Qaeda.” Asked for his view about waterboarding on ABC’s “This Week” in November, neurosurgeon Ben Carson said, “There’s no such thing as political correctness when you’re fighting an enemy who wants to destroy you.” POLITICO could not find any statements on the subject by Ohio Gov. John Kasich, and his campaign did not respond to a query about his position.

Opposing waterboarding is not “political correctness,”—it’s opposing a war crime. After WWII, some Japanese generals were tried as war criminals for the torture of the Allied prisoners of war.

Among the techniques used, alleged by prosecutors, was waterboarding. Some of those generals were convicted and later executed.