[S]ome on the left are unlikely to welcome her nomination. UNITE HERE, a union representing workers in hotels, casinos and other industries, calls Hyatt "the worst hotel employer in America."

"Hyatt has abused workers, replacing career housekeepers with minimum wage temporary workers and imposing dangerous workloads on those who remain," the union says on the website for its "Hyatt Hurts" boycott campaign.

In 2009, the company sparked a controversy when managers at three Hyatt-controlled hotels in Massachusetts fired their housekeeping staffs and replaced them with cheap subcontracted laborers. Earlier this year, the Hyatt Regency Baltimore reached a settlement with workers who alleged they were fired in connection with their unionizing efforts.