And one candidate in particular is leading: Ebrahim Raisi, the current judiciary chief, appointed by Mr. Khamenei, who has a long history of involvement in human rights abuses, and who lost in 2017 in a surprise victory by the outgoing president, Hassan Rouhani. With no credible challenger, Mr. Raisi is expected to win this time. Any serious competition has been winnowed from the race. Even some members of the Islamic Revolutionary Guards Corps, known for their strong hostility to any political dissent, described the election as anti-democratic.