Iranian enrichment
"Once you know how to enrich at any level, all you need is time to be able to enrich at a higher level. And they've already proven the ability to enrich at a higher level. In fact, they have and are doing so now," Rubio said on Tuesday.
"They claim that enrichment is a matter of national pride. It is our view that they want enrichment as a deterrent, they believe that it makes them a threshold nuclear power, and as a result, becomes untouchable," Rubio told the Senate Foreign Relations Committee. "That is the crux of the situation we're facing right now."
"Our hope is that we can encourage them to show them a path towards prosperity and peace that allow them to develop their economy, that allow them, if they want, to have a civil nuclear energy program like other countries around the world have - without enrichment."
Terrorism, missile sanctions
"Obviously we're aware of their sponsorship of terrorism in the region, including the Houthis and Hezbollah and other groups such as these, the militias in Iraq and their efforts to get back into Syria. Right now, the focus at this point of (the talks) has been their enrichment capability and their insistence on enrichment capability," Rubio said.