Vox cites an Atlantic Council Adrienne Arsht Latin America Center report on Cuba, US-Cuba: A New Public Survey Supports Policy Change:
A 2014 Atlantic Council poll asked Americans nationwide about four key parts of the embargo: restrictions on US businesses working in Cuba, restricting US citizens’s ability to spend dollars in Cuba, travel restrictions, and allowing Cubans to access US high-speed internet and telecom infrastructure. In all four cases, a majority Americans supported relaxing restrictions on Cuba.
The Atlantic Council poll also found bipartisan report for normal diplomatic relations with Cuba: 60 percent of Democrats and 52 percent of Republicans supported normalization.