Republican Senator Richard Lugar of Indiana's opinions are attached to a report due to be released Monday that could add fuel to momentum toward change in almost five decades of US policy seeking to isolate Cuba, the Americas' only communist country.
The United States and Cuba do not have full diplomatic relations. And Washington has had a full economic embargo on Havana since 1962.
Former US president George W. Bush in recent years however allowed Cuba to purchase US food, as long as it was purchased in cash. US food sales to Cuba have surged, but US farm producers would sell much more if Cuba could get credit for its purchases.
The report due out Monday stops short of recommending an end to the US embargo, The Washington Post reported.
Lugar supports "lifting Bush administration restrictions on travel and remittances to Cuba, reinstituting formal bilateral cooperation on drug interdiction and migration, and allowing Cuba to buy US agricultural products on credit," the Post said.
Secretary of State Hillary Clinton has promised a "review" of Cuba policy without providing details.