Republican US Senator Chuck Grassley introduced a bill that would require congressional approval for new tariffs, the day after President Donald Trump unveiled sweeping new taxes on imported goods. Grassley's bill, along with a measure that passed the Senate, are not likely to become law while Trump's Republicans hold majorities in both the Senate and House of Representatives. Some Republicans have expressed unease with parts of Trump's tariff plans, citing concerns about the cost of goods and services and the potential for long-term damage to the US economy.