But there is also broad business and political support across the country for expanding exports to what is seen as a small but eventually lucrative U.S. market. Republican governors from Texas, Arkansas and elsewhere have led trade delegations to Cuba, along with their state farm bureaus and chambers of commerce.

Companies from technology to tourism have established contractual relationships with Cuba under the Obama-era changes. With the approval of U.S. commercial air service to the island negotiated last summer, American Airlines and Jet Blue landed the first regularly scheduled flights from the United States to Havana on Monday.

“I think the American business community would be strongly opposed to rolling back President Obama’s changes, and strongly in favor of continuing the path toward normalization of economic and diplomatic relations,” said Jake Colvin, vice president of the National Foreign Trade Council.

“What is he going to do? Stop direct flights to Cuba? That’s actually popular,” Colvin said.