Who is Hashem Safieddine, the next chief of Hezbollah?

Hashem Safieddine, who'll succeed Hassan Nasrallah as chief of Hezbollah, is Nasrallah's cousin and the current head of political affairs of the group. Safieddine was designated a terrorist by the US State Department in 2017. Born in Lebanon, Safieddine is a "key member" of Hezbollah's executive Shura Council and his son is married to slain Iranian General Qasem Soleimani's daughter.