I find it interesting that Dianne Feinstein is the Democrat being tasked with telling Benjamin Netanyahu that he should "contain himself" and not criticize the Iran deal.
It is interesting because a) Feinstein is Jewish and b) did not boycott Bibi's speech to Congress last month although she said at the time she "would not be jumping up and down." But it gives the Obama Administration cover to say, "See even the Jews don't think Bibi is reasonable."
Feinstein is criticizing Netanyahu for not offering an alternative. But this assumes that Feinstein and for that matter the Obama Administration would be amenable to anything Bibi would have to offer. Obama has been clear in saying it's either this deal or nothing.