Will the outcome of Iran’s election affect the nuclear deal?

The future of the landmark 2015 pact is hanging in the balance as Iranians prepare to elect a new president.

Iranians head to the polls on Friday to elect a successor to President Hassan Rouhani, the reformist leader whose second term in office is coming to a close. Rouhani was one of the key architects of the 2015 nuclear deal which saw Iran consent to limiting its nuclear programme in exchange for sanctions relief. The vote comes at a moment of tension over the accord.