Given his position he has to be more delicate about it, but I think the AJC's David Harris' clarification of using Israel as a "wedge issue" is roughly in line with how I described it.
The examples Harris gives are not of honest disagreements about policy. They're cases where the tail is clearly wagging the dog -- where President Obama's opponents are looking for something to bash him with and just concoct frivolous objections in the hope that if they sneer enough, it will cause "the controversy brews!" style reporting. And that, for the reasons I expressed, is something qualitatively quite different from honest debate over various policies the US can take towards Israel (or that Israel can take towards Palestinians).