Utilize the input text as a context reference, choose the right relationship between Gary Doer and Ambassador from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

Chairman Orrin Hatch (R-Utah) and top Democrat Ron Wyden (Ore.) told Canadian Ambassador Gary Doer that his nation must agree to significantly expand market access for U.S. dairy exports in any 12-nation Trans-Pacific Partnership (TPP) deal or face the prospect of losing congressional support.

Answer: position_held