WASHINGTON, United States (AFP) — The chances of a Russia-Ukraine summit faded Friday as United States (US) President Donald Trump appeared to tire of peace efforts and Moscow poured cold water on efforts to end the grinding war in Ukraine.

Trump had raised expectations on Monday by saying that Russian President Vladimir Putin and Ukraine’s Volodymyr Zelensky had agreed to meet face-to-face — but on Friday, he compared the two men to “oil and vinegar.”

Russian Foreign Minister Sergei Lavrov said “no meeting” was planned as Trump’s mediation efforts appeared to stall, while Zelensky said Russia was trying to prolong the war.

Trump told reporters on Friday he would make an “important” decision in two weeks on Ukraine peace efforts, specifying that Moscow could face massive sanctions — or he might “do nothing.”

“It takes two to tango,” the US president, wearing a red baseball cap saying, “Trump was right about everything,” said in the Oval Office.

“In two weeks, we will know which way I’m going. Because I will go one way or the other, and I’ll learn which way I’m going,” he added.

“That’s whether or not it’s massive sanctions or massive tariffs or both. Or do we do nothing and say it’s your fight.”