I agree with you too. He is simply doing the bare minimum and issuing empty threats that everyone knows he will not carry out, simply to cover his own back.
What it does show is that the actions of the IDF have reached such a low that it has even forced the US to react to it, whether the concern is genuine or not is certainly questionable.
If this tactic is to gain votes then it will be a failed strategy. Voters who are watching the genocide unfolding in the north of Gaza will be furious that this is the best they could muster in order to prevent it.