In several cases, the report by Public Campaign says, members of Congress who had supported easing sanctions against Cuba changed their position - and got donations from the U.S.-Cuba Democracy Political Action Committee and its donors.

All told, the political action committee and its contributors have given $10.77 million nationwide to nearly 400 candidates and members of Congress, the report says.

The contributions include more than $850,000 to 53 Democrats in the House of Representatives who sent a letter to House Speaker Nancy Pelosi earlier this month opposing any change to U.S.-Cuba policy. The average signer, the report says, received $16,344.

The top five recipients of the embargo supporters' cash: Miami's three Cuban-American Republican members of Congress, 2008 Republican presidential nominee John McCain and New Jersey Democratic Sen. Robert Menendez, whose parents fled Cuba before his birth.