Former Ambassador-at-Large Nathan Sales and former naval aviator Gregory Glaros discuss CENTCOM’s announcement that the U.S. blockade in the Strait of Hormuz is being ‘fully enforced’ on ‘The Sunday Briefing.

President Donald Trump said his representatives are having “positive discussions” with Iran as the two countries trade peace proposals. Meanwhile, the average cost of gas in the US rose to $4.45 a gallon.

The announcement comes hours after a merchant ship reported being attacked by multiple "small" boats near the Strait of Hormuz.

China stands to be impacted first, as the main buyer of Iran’s crude oil. But if the blockade drags on, its knock-on effects could impact the whole world.

The strait is closed until the U.S. blockade is lifted, Iran's Revolutionary Guard navy said, warning that "no vessel should make any movement from its anchorage in the Persian Gulf and the Sea of Oman, and approaching the Strait of Hormuz will be considered as cooperation with the enemy" and be targeted.

As President Trump again voiced optimism that Iran will "make a deal" to end the war, Tehran declared itself the regulator of Strait of Hormuz shipping.

Trump gave few details of the plan to aid ships and their crews that have been "locked up" in the vital waterway and are running low on food and other supplies more than two months since the conflict

Iran has offered to end its chokehold on the Strait of Hormuz in exchange for the U.S. lifting its blockade on the country and an end to the war.

President Trump last week announced an operation to guide ships through the Strait of Hormuz amid the Iranian blockade, and then two days later, he announced it would be paused. Energy Secretary Chris Wright told "Face the Nation with Margaret Brennan" that the U.