Mr. Vice President is the United States now at war with Iran?

No, Kristen, we're not at war with Iran.

We're at war with Iran's nuclear program.

The president's been very clear, Kristen, we have no interest in a protracted conflict.

We have no interest in boots on the ground.

I don't like the regime, but we're not into the regime change business here.

We're into the safety and security of the United States business.

We are not pursuing regime change. We're not trying to put any troops on the ground into Iran.

We are trying to eliminate their nuclear weapons program.

No, I don't think I see boots on the ground in our future, but I do see Israel not stopping.

Some important distinctions being made yesterday by members of the Trump administration and

Republicans in the U.S. Senate saying that there's no interest in regime change are putting

boots on the ground in Iran. But President Trump isn't ruling out one of those possibilities.

We're going to have his latest comments in just a minute.

Meanwhile, Iran is promising to retaliate for Saturday strikes.

We'll look into what possible options they have.

It is a terribly shattered government right now.

Plus, Democrats and at least one Republican lawmaker are calling the action in Iran unconstitutional.

The question is, what can they actually do about it?

The answer is about the same thing that members of Congress have been able to do since, well, the end of World War II. Good morning and welcome to Morning Joe. It's Monday,

June 23rd. With us, we have co-hosts of our fourth hour contributing writer of the Atlantic,

Jonathan Lemire, and you a special correspondent for BBC News, Caddy Kay. Jonathan, I know you have

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