Here's what to know about the Jones Act, a century-old shipping law Trump is waiving to shield Americans from surging oil prices

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• The Trump administration announced plans to waive the Jones Act for 60 days.
• The goal is to reduce the impact of Iran war disruptions by making it easier to ship products to US ports.
• Studies have said waiving it could reduce gas prices, while others say it won't help ease the effects of the war.

US President Donald Trump wants to blunt the impact of disruptions stemming from the Iran war by temporarily lifting a century-old shipping law.