The administration still needs to negotiate with Canada before an agreement can be finalized, and relations with that country have been fragile lately.
The deal updating a 20-year-old free trade pact comes amid uncertainty about Mexican and European commercial ties with the U.S. under the presidency of Donald Trump.
The vice president had to dive into a packed agenda on short notice, attending the Summit of the Americas in Trump's place so the president could manage the U.S. response to Syria.
In a series of tweets, the president also says he may pull out of a trade agreement with Mexico unless it does more to stop people from crossing into the U.S.
"We're not trying to blow up the world," Commerce Secretary Wilbur Ross says of President Trump's "flexibility" regarding planned tariffs on steel and aluminum imports.
In renegotiating the treaty with Canada and Mexico, the Trump administration is acting in secret, just as Obama did with the Trans-Pacific Partnership.
When he was a candidate he promised that abandoning the trade deal -- hailed as one of the major achievements of the Obama administration -- would be one of his first actions as president.
The 5,544-page text of the Trans-Pacific Partnership confirms that the agreement would be another step in the global capitalists' march to enslave us. Open, sustained revolt is our only option.
Despite what President Obama says, the TPP does indeed create a corporate end run around our laws.
An Economic Policy Institute report released Tuesday confirms that a ballooning US-Mexico trade deficit has cost hundreds of thousands of American jobs, and predicts more of the same when the U-Korea Free Trade Agreement comes into force.