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WASHINGTON — President Barack Obama announced Wednesday plans to normalize diplomatic relations with Cuba and ease economic restrictions on the nation, a policy shift he called the end of an “outdated approach” to U.S.-Cuban relations that, “for decades, has failed to advance our interests.”

Obama said the U.S. will move toward reopening its embassy in the communist nation and allow some travel and trade that had been banned under a decades-long embargo instated during the Kennedy administration.

“Through these changes we intend to create more opportunities for the American and Cuban people, and begin a new chapter among the nations of the Americas,” he said.

Speaking at the same time as Obama from his own country, Cuban President Raul Castro lauded the move.

“This expression by President Barack Obama deserves the respect and recognition by all the people and I want to thank and recognize support from the Vatican and especially from Pope Francis for the improvement of relations between Cuba and the United States,” he said.

Obama’s announcement comes as both nations have released political prisoners in a show of goodwill, with American Alan Gross headed home on “humanitarian” grounds from Cuba early Wednesday morning. In a separate swap, a U.S. intelligence source held for 20 years was released in exchange for three jailed Cuban spies.

Obama said he and Castro spoke Tuesday in a phone call that lasted about an hour and reflected the first communication at the presidential level with Cuba since the Cuban revolution.

But some Republicans are warning the move will only strengthen the Castro regime in Cuba, which has long been accused of human rights abuses and is listed by the State Department as a state sponsor of terrorism.

Secretary of State John Kerry has been instructed to review Cuba’s place on the State Sponsors of Terrorism list, potentially paving the the way a lift on certain economic and political sanctions.

Wednesday’s announcement that the U.S. will move toward restoring diplomatic ties with Cuba will also make it easier for Americans to travel to Cuba and do business with the Cuban people by extending general licenses, officials said. While the more liberal travel restrictions won’t allow for tourism, they will permit greater American travel to the island.

While only Congress can formally overturn the five decades-long embargo, the White House has some authorities to liberalize trade and travel to the island.

In an effort to boost the nascent Cuban private sector, the President will also allow expanded commercial sales and exports of goods and services to Cuba, particularly building materials for entrepreneurs and private residences, and allow greater business training, as well as permit greater communications hardware and services to go to the island.

Other announced changes permit U.S. and Cuban banks to build relationships and travelers to use credit and debit cards. U.S. travelers will be allowed to import up to $400 worth of goods from Cuba, including $100 in alcohol and tobacco — even Cuban cigars. Remittances by Americans to their families back in Cuba will also be increased to approximately $2,000 per quarter.

Senior administration officials and Cuba observers have said recent reforms on the island and changing attitudes in the United States have created an opening for improved relations. U.S. and Cuban officials say Washington and Havana in recent months have increased official technical-level contacts on a variety of issues.

While the release of Gross drew widespread bipartisan praise, Republican lawmakers on Wednesday criticized the overall move to thaw relations as ill-advised.

Sen. Marco Rubio, R-Fla., called the easing of economic restrictions “inexplicable” in a statement.

“Appeasing the Castro brothers will only cause other tyrants from Caracas to Tehran to Pyongyang to see that they can take advantage of President Obama’s naiveté during his final two years in office. As a result, America will be less safe as a result of the President’s change in policy,” he said.

Rubio promised that as incoming chairman of the Senate Foreign Relations Committee’s Western Hemisphere subcommittee he’ll “make every effort to block this dangerous and desperate attempt by the President to burnish his legacy at the Cuban people’s [sic] expense.”

Administration officials, however, stressed the moves were not being undertaken to prop up the Castro regime, but rather to encourage further reforms on the island.

“None of this is seen as a reward. All of this is seen as a way of promoting change in Cuba because everything we have done in the past has demonstrably failed,” another senior administration official said. “This is not the U.S. government saying Cuba has gotten so much better. It is still an authoritarian state and we still have profound differences with this government.

“But if we hope for change with Cuba, we must try for a different approach. And we believe that considerably more engagement with the Cuban people and the Cuban government is the way to do that,” the official said, adding that the United States “will not for a moment lessen our support for improvement in human rights.”

To that end, Cuba has agreed to release 53 political prisoners from a list of names provided by the United States. At least one of the prisoners has already been released. Havana has also agreed to permit significant access by its citizens to the Internet and allow the International Committee of the Red Cross and United Nations human rights officials back on the island for the first time in years.

Talks between the U.S. and Cuba have been ongoing since June 2013 and were facilitated by the Canadians and the Vatican in brokering the deal. Pope Francis — the first pope from Latin America — encouraged Obama in a letter and in their meeting this year to renew talks with Cuba on pursuing a closer relationship.