Even for an administration that produces a surprise a day, this one is a shocker. The U.S. Solicitor General, the Justice Department official who represents the government before the Supreme Court, came down on the side of the PLO on Feb. 22 in a lawsuit filed by American families and victims of terrorist attacks in Israel.

The Trump administration wants the Supreme Court to refuse to hear the case of Sokolow v Palestine Liberation Organization, filed in 2004 by U.S. victims and families of terrorist attacks in Israel under the Anti-Terrorism Act (ATA) of 1992.

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Congress passed the ATA largely in response to the murder of

Leon Klinghoffer

, a 69-year-old New Yorker, in 1985. Klinghoffer was shot in the head and thrown overboard in his wheelchair when Palestinian Liberation Front guerillas took over a cruise ship.

“The ATA provides that perpetrators or supporters of international terrorism may be brought to justice in U.S. courts for injuring U.S. citizens regardless of where the injuries occurred,” wrote Sen. Charles Grassley Charles (Chuck) Ernest GrassleyGOP set to release controversial Biden report McConnell locks down key GOP votes in Supreme Court fight Senate Republicans face tough decision on replacing Ginsburg MORE, the bill’s original sponsor, in a letter to Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsGOP set to release controversial Biden report Trump's policies on refugees are as simple as ABCs Ocasio-Cortez, Velázquez call for convention to decide Puerto Rico status MORE last fall.

Grassley was one of 23 Senators who filed an amicus brief last April backing the families’ request that the Supreme Court take up the case. In 2016, the U.S. Second Circuit Court reversed a decision a year earlier by a District Court jury.

The lower court found the PLO liable for killing and injuring Americans in six shootings and bombings in the Jerusalem area from 2002 to 2004 and awarded $656 million in damages.

That trial, which lasted seven weeks, was heart-wrenching. One of the plaintiffs, Robert Coulter testified how he learned that his 36-year-old daughter, in Israel on a business trip, was a victim of a cafeteria bombing. “They brought a body bag out on the TV…and went right down to where she was laying, and I knew it was a girl, had blond hair,” said Coulter. “I said, ‘Oh, my goodness, that’s Janis.’”

This is exactly the kind of murder and mayhem that the ATA was designed to prevent, said the Senate brief, which was signed by such diverse lawmakers as Sens. Ted Cruz Rafael (Ted) Edward CruzMurkowski: Supreme Court nominee should not be taken up before election Battle lines drawn on precedent in Supreme Court fight Sunday shows - Ruth Bader Ginsburg's death dominates MORE (R-Texas) and Elizabeth Warren Elizabeth WarrenGOP set to release controversial Biden report Biden's fiscal program: What is the likely market impact? Warren, Schumer introduce plan for next president to cancel ,000 in student debt MORE (D-Mass.); Orrin Hatch Orrin Grant HatchBottom line Bottom line Senate GOP divided over whether they'd fill Supreme Court vacancy MORE (R-Utah) and Charles Schumer Chuck SchumerRepublican senator says plans to confirm justice before election 'completely consistent with the precedent' Video of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral Graham signals support for confirming a Supreme Court nominee this year MORE (D-N.Y.); James Inhofe James (Jim) Mountain InhofeChamber of Commerce endorses McSally for reelection Overnight Defense: Top admiral says 'no condition' where US should conduct nuclear test 'at this time' | Intelligence chief says Congress will get some in-person election security briefings Top admiral: 'No condition' where US should conduct nuclear test 'at this time' MORE (R-Okla.) and Richard Blumenthal (D-Conn.).

A similar amicus brief was filed on behalf of the entire U.S. House of Representatives. “In order to effectively address international terrorism,” it said, “Congress expressly gave [the] cause of action a broad extraterritorial sweep.”

Another brief was filed by a group of seven former federal officials, including two U.S. Attorneys General in Republican Administrations, John Ashcroft and Dick Thornburgh, and former FBI Director Louis Freeh.

They pointed out that the State and justice departments both endorsed the bill when it was being debated, with State saying it was a “welcome addition” to the anti-terrorism arsenal. Neither department “raised any question about the constitutionality of the ATA.”

Certainly, the PLO doesn’t want the Supreme Court reviewing the case. “This is a Palestinian victory that should not be underestimated,” said Palestinian Finance Minister Shukri Bishara after the appeals-court decision: and it is a big blow to anyone who attempts to blackmail us.” But why would the Trump administration, which continually burnishes it's terror-fighting credentials, file a brief siding with the PLO?

Even more baffling was that the Solicitor General focused almost exclusively on the rights of the Palestinians under the due-process protections of the Constitution, arguing that the PLO (which has offices in Washington and New York) is not sufficiently connected to U.S. territory and that the attacks in Israel were “indiscriminate — not aimed at Americans.”

Strangely silent was the State Department, despite a plea in August by Rep. Ed Royce Edward (Ed) Randall RoyceThe 'extraordinary rendition' of a US Presidential Medal of Freedom recipient, 'Hotel Rwanda' hero Gil Cisneros to face Young Kim in rematch of 2018 House race in California The most expensive congressional races of the last decade MORE (R-Calif), chairman of the House Foreign Affairs Committee, to Rex Tillerson Rex Wayne TillersonGary Cohn: 'I haven't made up my mind' on vote for president in November Kushner says 'Alice in Wonderland' describes Trump presidency: Woodward book Conspicuous by their absence from the Republican Convention MORE, asking for support on the side of the victims’ suit. It’s the department’s responsibility to protect Americans abroad, so you would think Tillerson would want to retain the ATA as a defensive weapon.

Instead, Tillerson has been silent. If Trump administration officials are hoping to unveil a grand bargain soon between Palestinians and Israelis, they should understand that siding with the PLO in a court case won’t help. In fact, it is counter-productive.

Imposing actual, financial costs on those who use and support terrorism is the right way to achieve peace. Giving the Palestinian Authority a free pass on the costs of its addiction to terror will only perpetuate the violence that has prevented a settlement for so many decades.

James K. Glassman is the chairman and CEO of Glassman advisory, which is a consulting firm. He served as under secretary of State for public diplomacy and public affairs in the George W. Bush Administration.