The “price war” between Russia and Saudi Arabia, which began after the OPEC + negotiations failure to reduce oil production, destabilizes the global energy market. US President Donald Trump is ready if necessary to join the negotiations between Russia and Saudi Arabia on the sharp drop in oil prices after the <a href="https://www.dw.com/ru/%D0%BD%D0%B5%D1%84%D1%82%D1%8F%D0%BD%D0......