After he was briefed on what the senior official described as a “productive” call between Secretary of State Marco Rubio and Russian Foreign Minister Sergey Lavrov on Monday, Trump essentially pressed pause — believing both sides in the Russia-Ukraine conflict were not ready to seriously talk peace, the official said.

The BBC's Russia editor says Trump's decision to call of his Putin talks and impose oil sanctions will not go down well in Moscow.

New sanctions on Russian oil giants show President Trump's frustration with President Putin as his peace effort falters.