President Trump’s 50-day Ukraine ultimatum to Russia is likely to fail because Vladimir Putin believes he can withstand any new sanctions and is not negotiating in good faith. -Even as Russia’s economy teeters on the brink of recession,

President Donald Trump may have expected a Russian shudder of fear to greet his threat of “very severe tariffs” on the country if it didn’t agree a ceasefire in Ukraine.

Donald Trump’s threat to impose secondary sanctions on countries buying Russian oil is probably more symbolic than practical, leading oil analyst and senior fellow at the Carnegie Russia Eurasia Center,