What Is the Growing Trade Deficit and the National Debt?

debt

When someone buys a toyota for example ,how does that place us in a position to have debt to japan.Is it because of countries who lent the US money by buying regime bonds?Please clarify.
I know it is when we buy more imports than exports in value. But that is still unclear.Specifically,why does it matter if we buy much more than we sell? I realize the national debt has to do with trade but it also relates to how much this country borrows money to finance our own budget.

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