Pete “Of The” Du Pont, on Opinion Journal:

Mr. Kerry is against free trade because he believes America must “establish core labor rights around the world.” He would repeal Nafta and other trade agreements[.]

From the John Kerry web site (which, unlike other presidential candidates’ sites, is accessible to international visitors:)

I strongly believe that America must engage in the global economy, and I voted for trade opening from Nafta to the WTO. (link)

The United States and Mexico made commitments with the signing of NAFTA. Both countries must abide by those commitments. (link)

From The Miami Herald:

His 19 years on the Senate Foreign Relations Committee have given him experience in national security and foreign affairs, including Latin America, where a frayed relationship needs attention. He supports NAFTA and FTAA and considers Miami the region’s key financial center.

From the Seattle Post-Intelligencer‘s 20 Questions with John Kerry & George Bush:

“President Clinton was trying to move us in the right direction on job creation and on including labor and environmental standards in trade agreements. I supported him and I made the right decision. We created jobs and opened markets, but since then we have learned that we need to go even further on labor and environment standards. John Edwards and I will fight so strong and enforceable labor and environmental standards are included in the core of future trade agreements, like they were in the Jordan Free Trade Agreement.” –John Kerry

So Pete, what, exactly, is the source for your claim?