Congress is considering a bill that could punish countries for artificially boosting oil prices. What could that mean for warming ties between Russia and Saudi Arabia?

The narrow and congested Mideast waterway has become a site of escalating U.S.-Iran tensions. Conflict in the wake of tanker attacks there could jolt global oil supplies.

Iran appears increasingly boxed in by intensifying U.S. sanctions, the latest of which will effectively cut it off from its main oil customers.