Jimmy Fallon spent a portion of Monday’s Tonight Show celebrating Trump’s defeat in the ongoing Lincoln Memorial Reflecting Pool saga.

The shallow pool was recently refurbished with a shade of dark blue and outfitted with “advanced nanobubbler technology” to tackle algae blooms that have long plagued the landmark — but algae returned shortly after the multi-million-dollar renovations were complete, and the new sealant started to peel off in chunks that bubbled to the surface.

Late last week, Washington, D.C. U.S. Attorney Jeanine Pirro moved to dismiss criminal charges against former Olympian David Hearn — one of several people arrested on suspicion of vandalizing the monument — after the Trump administration admitted that the damage to the recently installed blue liner was “the result of flawed installation by the contractor.”

Fallon, 51, weighed in on the president’s defeat, saying, “Trump is upset because his own Justice Department admitted the reflecting pool damage wasn’t caused by vandalism, like he said. It was just a result of shoddy construction work.

“Trump claimed someone used a knife to quickly cut the pool liner the length of three football fields. I can barely use a knife to cut open my Amazon box,” the late night host quipped.

Fallon then joked that Trump might now look to draining the monument, “covering it in green felt and turning it into a reflecting pool table.”

“We might be asking too much of Trump to reopen the Strait of Hormuz when he can’t even reopen the pool in his backyard,” Fallon added.

Trump initially said a refurbishing project for the 2,030-foot pool could be done quickly for $1.5 million in time for White House-backed Fourth of July celebrations. His administration has now spent nearly $14.7 million, with all funds directed to Atlantic Industrial Coatings LLC, Virginia, according to federal spending records.

The pool has been closed and drained — again — for more repairs.

Hearn, a two-time whitewater racing world champion who competed in the canoe slalom at three Olympic Games, was in the middle of a 52-mile bike ride on June 19 when he stopped to visit the pool.

“I reached in there, and I was able to grab the end of that flapping piece, the already peeling piece. It was still attached to the bottom. I didn’t remove anything,” he told The Washington Post last month.

That weekend, Trump claimed an unnamed “vandal” had “done everything possible to hurt the inside surface that was just installed” in an attempt to “destroy and demean our beautiful work.”

Hearn pleaded not guilty to one felony count of destruction of property earlier this month in the reflecting pool case. He was facing up to 10 years behind bars if convicted.

Trump has since lashed out at Pirro’s handling of the case, saying she “folded like an umbrella.”