A group of senators have introduced a bill to slow down the reopening of Cuba as the federal government inches closer to reestablishing ties. The senators, among them two presidential hopefuls, aim to restrict the flow of U.S. money into Cuba as restrictions become more lax.

Republican Sen. Marco Rubio introduced the "Cuban Military Transparency Act" to the U.S. Senate on June 3 to "prohibit financial transactions with the Cuban military" and establish other protocols. The U.S. government, however, has been in negotiations since December, when it announced it would begin reestablishing ties with the Communist state.

Six Republican senators and one Democrat, Sen. Robert Menendez of New Jersey, back Sen. Rubio's bill. Sen. Ted Cruz is one of the Republican backers and is also competing with Sen. Rubio for his party's presidential nomination. These three senators are all of Cuban descent and have vocally opposed the Obama administration's efforts to resume relations with the island nation...

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