WASHINGTON, July 25 (Reuters) - U.S. President Donald Trump is unlikely to follow through on his threat to place 100% tariffs on countries that buy Russian oil because it would worsen politically-damaging inflation pressures and his similar threat against buyers of Venezuelan oil has had limited success, especially in China.

President Trump said Friday that Russian President Vladimir Putin and Ukrainian President Volodymyr Zelensky will hold peace talks, but Russia said not to expect that soon. "It's going to happen," Trump told reporters,