Donald Trump says Iran's army, navy and air force have been totally obliterated.

So why is he sending 5,000 service members to the Middle East?

And Susie Wiles, the president's chief of staff, has breast cancer.

She's one of the most influential people in the president's ear. As she recovers, how could the White House change if she is not always at his side?

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Watch Michael Clarke's explainer by clicking on this link.