If there’s one thing President Obama and a lot of Congressional Republicans agree on – and really, it might just be the one thing – it’s the idea that Congress should give the president renewed powers to negotiate trade agreements with other countries. But Sen. Sherrod Brown (D-Ohio), a longtime critic of American trade policy, says Obama shouldn’t get that authority unconditionally. In order to pass the so-called “fast-track” authority, Brown wants Congress to force the administration to strengthen enforcement of trade rules already on the books, to step up infrastructure spending and training programs for workers displaced by outsourcing and to retaliate against China for depressing the value of its currency. He’ll outline that agenda in a speech on Friday morning, but he discussed it with Wonkblog on Thursday. The transcript is lightly edited for length and clarity.