How a US blockade near the Strait of Hormuz could work

A blockade of Iranian ports that President Donald Trump said began Monday could further disrupt oil prices.

It also is spurring questions about international law and leaves doubts about whether the pressure tactic will force Tehran to reopen the vital Strait of Hormuz.

Trump threatened to impose the blockade after talks to further a fragile ceasefire ended without a deal this past weekend.

Experts say enforcing the blockade is likely to demand significant resources from the U.S. Navy and could prompt concerns about military force and international law.

Supply chain restrictions alsp could undermine the flow of oil, fertilizer, food and other goods to consumers already facing higher prices.