The flaw is the law itself, said Representative Kevin Brady, chairman of the House Ways and Means subcommittee on health.

Levin, who chairs the House Ways and Means subcommittee on trade, said he expected discussions with Colombian officials will lead to congressional hearings.

This is the kind of back and forth that happens to people who apply for tax-exempt status, Shulman told a House Ways and Means subcommittee.