"I am saddened and outraged by the senseless attack at a Jerusalem synagogue this morning. My thoughts and prayers are with the families of the four victims, including American citizens Aryeh Kupinsky, Cary William Levine, and Mosheh Twersky. It is essential that President Abbas address the incitement of violence in recent weeks, and in the wake of this horrifying attack I urge both Israeli and Palestinian leaders to work to de-escalate the rising tensions in Jerusalem and the region."