KHAN YOUNIS, Gaza Strip (AP) — A senior Palestinian official says President Mahmoud Abbas has canceled his participation in a meeting scheduled Wednesday with President Joe Biden and other Mideast leaders. Abbas was scheduled to join Jordan’s King Abdullah II and Egyptian President Abdel Fattah el-Sissi at Wednesday’s summit in Amman, Jordan, where they are to discuss the latest Israel-Hamas war with Biden. But the senior official said Abbas was withdrawing to protest an alleged Israeli airstrike on a hospital in Gaza that Hamas health officials say has killed over 500 people. The official spoke on condition of anonymity because...