U.S. President Donald Trump is expected to pressure Saudi Arabia and OPEC to lower oil prices, a move that could eventually lead to a new oil price war ...

Several OPEC members, including the United Arab Emirates and Iraq, have been pressing the group to raise output faster, arguing that they had invested a lot in expanding their capacity.

One source said these took place on the sidelines of the Arab Energy Fund's 50th anniversary celebration in Riyadh, and were not a planned OPEC meeting. Oil prices have risen this year ...