A potential Tunisian presidential candidate on Friday received an eight-month prison sentence and lifetime ban from running for office, reports said, with NGOs warning of increasing obstacles for President Kais Saied’s opponents. Lotfi Mraihi, head of left-wing opposition Republican People’s Union, was arrested on July 3 on suspicion of corruption. In addition to the prison sentence, Mraihi, who announced his candidacy in early April, was given a lifetime ban from standing in any election, Tunisian media said. Saied, who was democratically elected in 2019 but launched a sweeping power grab in …