I would not recommend Israel think the U. S. has it’s back, as it traditionally has.
Plan for the worst case scenario, and be happy if it doesn’t play out that way.
I do believe that those ties are strong today, but Obama being in the Oval Office can block and cancel many things that make those strong ties. Obama won’t get rid of those ties, by the time he gets out of office, so they can be made stronger still, later on, with a LEGITIMATE PRESIDENT in office.