Washington President Barack Obama is aggressively pushing an ambitious agenda to liberalize global trading.
But already political trade wars are forming, and they're with fellow Democrats rather than with Republicans, who usually are his antagonists on most other fronts.
Obama is promoting free-trade proposals with Europe and Asia that together could affect up to two-thirds of all global trade.
The ambitious deals would reduce or eliminate tariffs and other trade barriers. But there's trouble ahead for both the Trans-Pacific Partnership and the Trans-Atlantic Trade and Investment Partnership - at the negotiating table and from Congress.
The proposed deal with Europe will be a top item this coming week in Northern Ireland at the Group of Eight summit of major industrial democracies.