Shortly before the start of talks with Iran, the US Senate approved new sanctions. Several factors suggest the move is merely symbolic.
Any real sanctions against the ayatollahs would have surely derailed the talks, as Iranians, in their usual manner, would protest by walking out.
The Senate’s support for the sanctions was unanimous, which suggests that the sanctions were unacceptable to no one.
New sanctions follow the US drive to water down the existing sanctions by providing exemptions to EU countries and accepting minor reductions in oil purchases from Iran by Asian economies.
Iran already circumvents the sanctions on its oil shipping company by hiring foreign tankers, and it has established its ability to sell its entire oil output to third-world countries unconcerned with American sanctions.