Donald Trump failed to deliver a campaign vow to restore the post-9/11 practice of waterboarding suspects held in U.S. custody, according to available accounts.

An official policy change would require passage of a new law permitting waterboarding, plus an overhaul of President Barack Obama's executive order banning the practice. Trump has done neither. The interrogation method, which simulates the experience of drowning, remains illegal.

National security law experts and human rights groups told us there's also no evidence the practice is being carried out in secret.

"As far as we know, Trump hasn't brought back waterboarding," said Daphne Eviatar of Amnesty International USA.

An official at Human Rights Watch echoed this sentiment, but cautioned that monitoring groups have not been granted access to certain detainees, including those held at the U.S. military prison in Guantanamo Bay, Cuba.

In May, Trump's CIA director Gina Haspel promised lawmakers that the kinds of harsh interrogation methods employed after 9/11, which many believe to be torture, would not be revived on her watch.

"I can offer you my personal commitment, clearly and without reservation, that under my leadership CIA will not restart such a detention and interrogation program," Haspel said in her May 9, 2018, Senate confirmation hearing. She added that CIA interrogations would comply with the Army Field Manual, which prohibits waterboarding.

Karen Greenberg, an expert on torture and director of Fordham Law School's Center on National Security, said she believes the practice is consigned to the past.

"I think this is now a part of history. It's not part of the present — we've seen no evidence of that," she said. "There could be things going on, but it seems like a long step, and I don't think they're going down that road again."

Because Trump has failed to use legislative or executive means to restore waterboarding, and given that human rights groups have found no evidence it's being carried out in secret, we rate this Promise Broken.