> That power derives in part from the influence Jewish voters have on presidential elections.

The definition of democratic. This constituency has an issue they care about, and votes for it.

Everyone has a top issue. Some folks vote based on gun control. Some vote based on healthcare. Some vote based on foreign policy. Everyone only gets one Most Important Thing, and if they organize around it shit happens. If there was a constituency that cared as much about changing our Israeli policy then things would change, but alas the folks complaining don’t actually care very much.

If you want a parallel example, look at how the US foreign policy towards Cuba is successfully shaped by a rather small number of Cuban Americans in Florida. They care, they advocate, shit happens.