Back at it: What's next for tariffs, Iran and the midterms

There has been no shortage of news coming out of the White House this summer, and things are about to ramp up even more. From the ongoing trade war between Canada and the U.S., to the war in Iran and midterm elections in November, Washington correspondents Katie Simpson, Willy Lowry and Paul Hunter are back together to give you the lowdown on what to expect in the next few months.