Iran says US President Donald Trump has insulted the Organization of the Petroleum Exporting Countries (OPEC) by trying to use political pressures to change the policies of the Organization. "The OPEC's basis and principle is that the oil market should not be political and that political issues should not interfere in the market so that supply and demand determines the final oil price," Iran's Petroleum Minister Bijan Zanganeh said in an interview with state television on Friday. "But, some political measures and instabilities spark concerns in the oil market and increase price, including Trump's insulting order to some OPEC members, which is an insult to the national sovereignty of independent countries that are members of the organization," he added. Zanganeh also noted that Trump's moves have increased the global oil prices in recent days. Trump's order to oil producing countries to raise output "is very insulting to the people of these countries and would undermine their national sovereignty and destabilize the oil market," he said. PressTV-Iran blasts Trump's 'insulting' order to OPEC Still mad.