AND PETER NICHOLAS, WASHINGTON, PORT-OF-SPAIN, TRINIDAD, AND TOBAGO — The U.S. and Cuba built sudden momentum Friday toward easing half a century of hostility as President Obama met Havana's willingness to discuss sensitive topics, including human rights, with a declaration that he was ready for a "new beginning" in relations.
One official acknowledged that the Obama administration was caught off guard by Cuban President Raul Castro's willingness to discuss issues long considered off-limits by the communist leadership. Obama wants Cuba to make the next move, possibly by releasing political prisoners or removing restrictions on the press, the official said.
Cuba's willingness to talk does not mean it is willing to change policies. But the rhetorical exchange was the most hopeful sign in years of a thawing in relations between the two countries. The possibility of change was emphasized by a friendly greeting between Obama and Venezuelan President Hugo Chavez, a longtime U.S. critic and supporter of Cuba.
Obama and Chavez were among the leaders attending the Summit of the Americas in Trinidad and Tobago, a gathering of 34 democratically elected leaders from the Western Hemisphere. The two presidents shook hands and smiled broadly at each other.
The flurry of overtures represented the latest in the diplomatic choreography since the election of Obama. The U.S. president has called for a new openness with Cuba and has begun easing restrictions on contacts with the island.
Castro responded Thursday at a meeting of leftist leaders in Venezuela.
"We are willing to discuss everything -- human rights, freedom of press, political prisoners, everything, everything, everything they want to talk about," Castro said. "We could be wrong, we admit it. We're human."
Obama, in opening remarks at the summit Friday, spoke of the relationship between the two countries.
"The United States seeks a new beginning with Cuba," Obama said. "Over the past two years, I have indicated -- and I repeat today -- that I am prepared to have my administration engage with the Cuban government on a wide range of issues -- from human rights, free speech, and democratic reform to drugs, migration and economic issues."
Analysts and lawmakers who favor expanded U.S. contact with Cuba cautioned that at least three attempts in the last 35 years to relax tensions collapsed in acrimony.
But Castro's explicit offer to discuss issues such as political prisoners and human rights with U.S. officials was apparently a first for a top Cuban official, and White House Press Secretary Robert Gibbs said Obama administration officials were "particularly struck" by that concession.
Arriving at the Summit of the Americas, Obama approached Chavez as leaders waited in line to enter a reception. The two spoke about changing their countries' relationship, Chavez's office said in a statement, which a senior Obama administration official did not dispute.
During his opening remarks, Obama did not say he would seek to end the U.S. trade embargo against Cuba. But he indicated an openness to shift U.S. policies, pointing to his decision this week to ease travel and financial restrictions on Cuban Americans.
U.S. Secretary of State Hillary Rodham Clinton, speaking earlier, addressed Castro's remarks more directly.
"We welcome this overture," she said at a news conference. "We're taking a serious look at how we intend to respond."
The comments point at least to the likelihood of new talks. But the two countries remain stalemated on major issues: Cuba wants the U.S. to lift the embargo and remove remaining travel restrictions, but the Obama administration wants Havana to free political prisoners, improve human rights and adopt economic reforms before the U.S. takes more significant steps.
Nonetheless, experts said that even in the absence of progress on such major issues, U.S. and Cuban officials could take first steps in other areas, such as migration or counter-narcotics efforts.
Cuba was not invited to the Summit of the Americas because Castro is not democratically elected.
But the country's inclusion in the economic and diplomatic affairs of the hemisphere emerged as a top subject of the three-day summit. Many leaders called for a repeal of the U.S. embargo and greater inclusion of Cuba.
"I don't feel comfortable attending this summit," said Nicaraguan President Daniel Ortega, a onetime leftist rebel leader. "I feel ashamed of the fact that I'm participating in the summit with the absence of Cuba."
The secretary-general of the Organization of American States, Jose Miguel Insulza, said he would push for Cuba's inclusion in the organization.
The Cuban government has repeatedly hinted that it is ready for a thaw in relations with the United States, only to clamp down, possibly fearful that improved relations would threaten its hold on power.
Cuba experts and lawmakers cautioned that the latest warming signs could be short-lived as well.