A key Palestinian decision-making body convenes on Sunday for the first time in nearly four years in a session that could be a stepping stone for two potential successors to 86-year-old President Mahmoud Abbas. The Palestine Liberation Organization’s (PLO) Central Council last met in 2018, hampered by internal divisions among Palestinians. Hamas and Islamist Jihad movements turned down an invitation to attend Sunday’s meeting, saying Abbas had to institute power-sharing reforms first. Abbas heads the PLO and the Palestinian Authority (PA), which exercises limited self-rule in the Israeli-occup…