The bill spearheaded by Rep. Gene Taylor, a Mississippi Democrat, would require President Barack Obama to give Mexico and Canada six months notice that the United States will no
longer be part of the 16-year-old trade pact.

"At a time when 10 to 12 percent of the American people are unemployed, I think Congress has an obligation to put people back to work," Taylor
said.

He argued NAFTA has cost the United States millions of manufacturing jobs and hurt national security by encouraging companies to move production to Mexico.

The high unemployment rate makes it the "perfect" time to push for repeal even though past efforts have failed, he said.

"You'll see the American people rally behind this, in my humble opinion," said Rep. Walter Jones, a North Carolina Republican who is one of about 28
co-sponsors of the bill.

Business groups like the National Association of Manufacturers and the U.S. Chamber of Commerce strongly support NAFTA, which they say has spurred
U.S. economic growth by tearing down trade barriers between the three
countries.

The repeal proposal comes as Obama says he wants to resolve problems blocking congressional approval of long-delayed trade deals with South Korea, Panama and
Colombia.

The strongest opposition to those agreements comes from Obama's fellow Democrats.

The United States also will begin talks later this month with Australia, New Zealand, Singapore, Chile, Peru, Vietnam and Brunei on an
Asia-Pacific regional free-trade agreement.

Obama criticized NAFTA during the 2008 presidential election campaign but has not followed through on threats to withdraw from the agreement if
Canada and Mexico did not agree to revamp the pact's labor and
environmental provisions.

But many Democrats are pushing for that and other changes to existing trade deals before considering any new deals such as the deals with South
Korea, Colombia and Panama.

The House of Representatives is expected to vote later this year on whether the United States should remain a member of the World Trade
Organization.

U.S. law allows House and Senate members to request a vote on that issue every five years. In 2005, 86 of the House's 435 members voted to withdraw from
the world trade body.