Saudi Arabia is monitoring the impact of the U.S. withdrawal from the Iran nuclear deal on oil supplies and is ready to offset any shortage but it will not act alone to fill the gap, an OPEC source familiar with the kingdom’s oil thinking said.  U.S. President Donald Trump on Tuesday abandoned a nuclear deal with Iran and announced the “highest level” of sanctions against the OPEC member. The original agreement had lifted sanctions in exchange for Tehran limiting its nuclear program. Iran is the third-largest oil producer in the Organization of the Petroleum Exporting Countries after Saudi Arabia and Iraq. During the last round of sanctions, Iran’s oil supplies fell by around 1 million barrels per day (bpd), […]