Rahm Emanuel will declare that “the most important thing a true friend can do is to tell the truth even when it’s painful,” in a speech at Tel Aviv University aimed at forcing a reconfiguration of US policy on unconditional support for Israel.

After decades of reliable bipartisan backing for Israel, a new AP-NORC poll reveals a dramatic erosion of support for the longtime U.S. ally, with rising opposition from Democrats and signs of division among Republicans.