Moscow/Washington: Russia stepped up pressure on the US to return seized diplomatic compounds in one of the first tests of whether Donald Trump and Vladimir Putin can convert the personal rapport of their initial meeting into improved relations.

After talks in Washington between US Undersecretary of State Thomas Shannon and Russian Deputy Foreign Minister Sergei Ryabkov, the Foreign Ministry in Moscow said Tuesday that it “reserves the right to retaliate on the principle of reciprocity” in a statement that made no mention of a deal to end the dispute. There’s “almost” an agreement, Ryabkov said after Monday’s meeting, according to CNN. There was no immediate US comment on the talks.

The country houses outside New York and Washington must be returned unconditionally after they were taken over by the US “absolutely in breach of international law,” Kremlin spokesman Dmitry Peskov told reporters on a conference call Monday. “We continue to hope that our American colleagues will demonstrate political wisdom and political will,” he said.

Russia’s made increasingly strident demands for the issue to be resolved since it was discussed at Trump and Putin’s first official meeting, which stretched for more than two hours at the Group of 20 summit in Hamburg this month. It’s threatening to retaliate by seizing US embassy property in Moscow and expelling diplomats. The confrontation is putting Trump in a bind as he seeks to strengthen relations with Putin while also battling investigations in Washington into whether members of his campaign team colluded with Russia during last year’s presidential elections.

‘Daylight robbery’

The US will commit “daylight robbery” if it fails to return the properties, Russian Foreign Minister Sergei Lavrov told reporters during a visit to Belarus on Monday. There are “sensible people” in the administration who understand that outgoing President Barack Obama took the action to try to spoil prospects for Trump to improve relations with Russia, he said.

Putin broke with tradition and refrained from retaliating when Obama expelled 35 Russian diplomats and shut down the two compounds in December in response to the election hacking that US intelligence agencies blamed on Russia. Trump hailed Putin’s decision at the time on Twitter as a “great move” and said “I always knew he was very smart!”

Nearly six months after Trump took office pledging to repair ties that all but collapsed under Obama, however, Russia’s patience is running out over his failure to reverse the measures.

The dispute shows there’s “a severe crisis in relations” between Russia and the Trump administration, according to Fyodor Lukyanov, head of the Foreign and Defence Policy Council, an advisory body to the Kremlin. “An absolutely small thing has become fundamental for both sides” and may create a spiral of tit-for-tat responses, he said.

‘Harsh’ Response

Putin’s gesture “was an advance to the Trump administration, giving it a wonderful chance to junk the traps laid by Obama,” Konstantin Kosachyov, chairman of the international relations committee of the upper house of the Russian parliament, wrote on Facebook on Friday. “Let’s hope for wisdom, otherwise all the ‘mines’ laid by Obama and his team under the future of Russian-American relations will go off.”

While Putin’s been patient until now, measures planned against the US are “so harsh that they will really feel it” if the Washington talks fail, Russian state TV presenter Dmitry Kiselyov said on his flagship Sunday program. US embassy officials will be expelled and “for those diplomats and families left behind, conditions will worsen to such an extent that they’ll be able to ask the State Department for bonuses” for working in Russia, he said.

The Trump administration may return the country houses to Russia because “we want to give collaboration, cooperation a chance,” in order to secure progress on issues such as resolving the war in Syria, Sebastian Gorka, a deputy assistant to the president, told CNN on Thursday.

Russia cancelled a previous meeting between Ryabkov and Shannon in St Petersburg last month after the US imposed new sanctions on Russian companies and individuals over the conflict in Ukraine. Monday’s meeting offered a chance to “deal with some of these so-called irritants” in relations, State Department spokeswoman Heather Nauert told reporters last week.