Tim Kaine, a Democrat, is a U.S. senator from Virginia. Rand Paul, a Republican, is a U.S. senator from Kentucky.

Here are some statements that should transcend party label: Tariffs are taxes on imports paid by American consumers. Congress, not the president, has the constitutional authority to levy taxes. Massive tariffs on close trading partners such as Brazil and Canada are ill-advised abuses of presidential power that will make Americans poorer.

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