Trump is virtually friendless amid the tensions with Iran

Trump also made comments on Saturday that have seemingly unnerved top US allies. In threats aimed at Iran, the president said that if any "Americans" or "American assets" are hit then the US will strike 52 targets. Trump said that "Iranian culture" sites could be among the targets. Targeting cultural sites in armed conflict could be considered a war crime, but Trump doubled down on the threat on Sunday.

"They're allowed to kill our people," Trump said to reporters. "They're allowed to torture and maim our people. They're allowed to use roadside bombs and blow up our people, and we're not allowed to touch their cultural sites? It doesn't work that way."

Subsequently, British Prime Minister Boris Johnson warned Trump that any attempt to target Iranian cultural sites would be a breach of international law.

"There are international conventions in place that prevent the destruction of cultural heritage," a spokesperson for Johnson said.

"You can read the international conventions for themselves," the spokesperson added. "It is the 1954 Hague Convention for the protection of cultural property in the event of armed conflict."

Trump has made a habit of pushing leaders of traditional US allies away, but Johnson has been among the few he's remained on good terms with. . .