Donald Trump accused of violation of a presidential oath

The congressman Adam Bennett Shiff declared that Donald Trump broke again a presidential oath, demanding from China and Ukraine to begin investigation concerning the former vice-president Joe Biden and his son Hunter. Adam Bennett Shiff, the chairman of committee of the House of Representatives of United States of America on investigation: "That President of the United States induces again the foreign state to interfere to help the campaign, investigating cases of the rival, is fundamental violation of a presidential oath"...