The debate over whether the US should impose a federal tax on wealth has gripped US politics after Democratic candidate for president Elizabeth Warren tabled the plan as one of the pillars of her campaign.
Ms Warren has advanced the idea as a way of paying for her healthcare proposals. But the prospect is an uncomfortable one for the country’s billionaires. Microsoft founder Bill Gates last week questioned whether Ms Warren would be willing to sit down with him to discuss the plan — she responded that she would love to explain to him exactly what he might pay.
Here is what they might discuss.
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