Jane Harman: “We can't leave a force there without a status of forces agreement.”

I think we should be very, very careful, given the Iraq experience, and if the people of Iran who elected their government by more than 50 percent in a four-way field want to change their government, then let them do that.

I think that if President Trump can reach a strong deal with the North Koreans he will deserve enormous credit.

But imposing sanctions and continuing to impose them on Iran's malign behavior in the region, which is permissible, is the right way to go.

I think Congress has to enact an authorization to use military force for the region, which would identify the trade-offs and how to create a strategy for United States leadership that puts maximum pressure not just on Iran.