Strait of Hormuz blockade explained: why is Trump threatening it now and will it increase the price of oil?

The threat from the US president has left markets in another period of uncertainty, with questions over how the blockade will be enforcedDonald Trump has said the US will begin a blockade of the strait of Hormuz, after ceasefire talks with Iran ended without an agreement over the weekend.The strait has emerged as Iran’s most effective weapon in its asymmetric war with the US. Since 28 February, the US and Israel have pounded Iran, striking thousands of targets and killing dozens of the country’s...