By ABDI LATIF DAHIR and SANAM MAHOOZI Iran was expected Wednesday to execute a 26-year-old protester who was sentenced to death just days after his detention, according to human rights groups and family members. President Donald Trump has threatened “strong action” if Iran carries out any such death sentences. As Iran tries to crush anti-regime protests that began more than two weeks ago, the country’s chief justice, Gholam-Hossein Mohseni-Ejei, urged speedy trials and executions of “rioters”...