In many states, you have to pay sales tax whenever you buy an item from a brick-and-mortar store, but not when you buy it online. That may end soon, as Congress is considering a bill that would allow states to force internet retailers to charge sales tax, too. On my America Weekend show, I asked US News business columnist Rick Newman what the impact of imposing that tax would be on both consumers and businesses — and why Amazon is for it while eBay is against it.

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