The president, in an effort to pile pressure on one of America’s closest allies over the rising cost of oil, called on the kingdom to increase its defence budget or face an uncertain future. Speaking at a campaign rally in Mississippi, he said: "I love the king, King Salman, but I said: 'King, we're protecting you. You might not be there for two weeks without us. You have to pay for your military, you have to pay."' Read more Saudi Arabia struggling to sell oil after raising output for Trump Crude oil prices are at a four-year high with the November mid-term elections looming, and Mr Trump claimed just last week that oil producers were “ripping off the rest of the world”. The president did not on elaborate when he spoke to the Saudi monarch, but reports suggested the two leaders last shared a telephone call over the weekend. State-run Saudi Press Agency said the pair discussed "efforts to maintain supplies to ensure...