Senate Democrats gave President Trump’s CIA nominee Gina Haspel a fierce grilling Wednesday over the post-9/11 “enhanced interrogation” program, which is fair enough. The question is, how many will vote against her — after they voted to confirm President Barack Obama’s CIA pick, John Brennan, back in 2013?

Brennan, after all, was also deeply involved in the use of waterboarding and other now-controversial techniques to gain vital intelligence from captured terrorists. That’s why the American Civil Liberties Union opposed his confirmation (as it has Haspel’s), citing his “complicity” in the program.

In fact, Brennan praised it in 2007, telling CBS: “A lot of information . . . has come out from these interrogation procedures that the agency has, in fact, used against the real hard-core terrorists . . . It has saved lives.”

Yes, he later walked back those comments while serving as Obama’s top counterterrorism adviser — and as point man in the also-controversial use of drones to kill terrorists, and sometimes bystanders as well.

Fifty Senate Democrats voted to confirm Brennan; 36 remain in office. That includes five current Intelligence Committee members, as well as New York’s Chuck Schumer and Kirsten Gillibrand.

Haspel told the committee she wouldn’t restore the program, even if Trump so ordered. Yes, she refused to call it “immoral” — and rightly so: that would be a cheap concession to political grandstanding.

After all, the CIA fully briefed Nancy Pelosi and other key Democrats in Congress on what it was doing in those scary early days of the War on Terror, and none objected.

Haspel was plainly doing her job when (as chief of staff for the CIA leader who actually made the call) she played a role in destroying videos of interrogations in order to prevent them from being leaked (as similar info then was) and so endangering the lives of men and women who’d been trying to protect this country.

A 30-year veteran already serving as acting CIA chief, Haspel would be the first woman to lead the agency and the first director in decades who’s spent her entire career there. She has the enthusiastic support of pretty much anyone who’s ever worked with her, including several top Obama officials who are now loudly anti-Trump.

Any Democrats voting against her, especially those who voted to confirm Brennan, ought to give a good explanation why. They could cite the statement opposing her from 9/11 mastermind Khalid Sheik Mohammed…