But a senior Democratic aide suggested that even if Bush attempted to link the aid package to the trade deal, Congress may be likely to stand up to him and pass the aid package separately.
He also wants to extend a package of expiring trade laws, including a textile provision that helps Haiti and other preferences for the poorest countries.
But China's accession to the World Trade Organisation, which brings a package of market-opening concessions, sealed the switch to unconditional relations.