Without a border tariff against countries that don't cap their greenhouse gas emissions, U.S. climate change legislation can be only so successful, Sen. Sherrod Brown, D-Ohio, said today.

Speaking with NationalJournal.com after addressing a manufacturing conference hosted by the left-leaning Institute for America's Future and the Alliance for American Manufacturing, Brown dismissed criticism that a tariff provision would ignite a trade war. "I don't want a tariff just to have a tariff," Brown maintained. "I want it there as a lever -- a hammer, if you will -- to get countries around the world to do the right thing on climate change."

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