With its oil-export routes once again under threat, Saudi Arabia is stepping up its military campaign against an old antagonist.

The Iranian government is taking an increasingly aggressive approach as it confronts a growing economic threat and worries that its grip on the Strait of Hormuz is slipping, analysts say.

President Trump said a cease-fire agreed in June would lead to limits on Iran’s nuclear program and finish the conflict, but the countries appear far apart.

Ayatollah Mojtaba Khamenei’s appointment of hard-line loyalists to top jobs suggests he is prepared to keep the country on a war footing and to quash domestic dissent.