The gulf between Washington and allies over Donald Trump’s friendly stance to Russia deepened Thursday amid reports that its closest intelligence partners were discussing withholding sensitive information from their U.S. counterparts. They fear agents or foreign assets could be compromised.

It comes after Trump called for Moscow to be readmitted to the G7 group of nations and as the U.S. paused intelligence sharing with Ukraine. The result is panic among European leaders that they may not be able to rely on American protection for much longer.

French President Emmanuel Macron has already said he was ready to discuss extending his nation’s nuclear umbrella to allies and that he will host a meeting of army chiefs from European countries ready to send peacekeeping troops to Ukraine after a peace deal.

The sense of a growing transatlantic rift was heightened when NBC cited multiple sources saying allies including Israel, Saudi Arabia and members of the so-called Five Eyes spy alliance—Australia, United Kingdom, Canada , New Zealand and the U.S.— were weighing whether to change protocols for sharing intelligence with the Washington.

The sources said any revisions would take into account the Trump administration’s conciliatory approach to Russia into account. ‘Those discussions are already happening,’ said a source. The review is one piece of a broader look at relations with Washington, including trade and diplomacy, said the sources.

During Trump’s first term, he was accused of sharing highly classified intelligence about the Islamic State with the Russian foreign minister during a meeting in the Oval Office. The information came from another country, which had not given permission for it to be shared for fear of exposing the source, according to the Washington Post. This time around, administration officials have explained their warming relations with Russia as a way of bringing Moscow to the negotiating table and ending the war in Ukraine.

A spokesman for the National Security Council said Trump was clear-eyed on security threats. ‘The U.S. has unrivaled intelligence capabilities which is exactly why intelligence sharing initiatives such as the Five Eyes exist,’ spokesman Brian Hughes told NBC. ‘President Trump is clear-eyed on all threats our adversaries pose to our national security and he will work with any ally or partner who understands the dangerous world inherited after the disastrous Biden years.’

A day earlier, the White House confirmed that it had halted the supply of intelligence to Ukraine. ‘We have, we have taken a step back,’ National Security Adviser Mike Waltz told reporters at the White House on Wednesday. He added that the Trump administration was pausing and reviewing ‘all aspects of this relationship.’

It came after Washington paused military aid to Kyiv on Monday following a dramatic public row between Trump and Ukrainian President Volodymyr Zelensky in the White House on Friday. European Union held emergency talks Thursday on ways to quickly increase their military budgets in response.

British Prime Minister Keir Starmer is trying to act as a bridge between disgruntled European leaders and Trump. He played down the idea that the two sides are at loggerheads, saying that the U.S. remained a crucial ally and that he was working to ‘ get the U.S., and European allies onto the same page so that we can all focus on what matters most, which is lasting peace in Ukraine.

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