For years, American outreach to Cuba came in many forms: mafiosos, poison-drenched wetsuits, toxic cigars. But today we learned of a new tactic in the campaign to undercut the Castro regime: a stealth effort by the U.S. government's humanitarian aid agency to create a Cuban version of Twitter.

For more than two decades, running for Congress in this sun-soaked capital of Cuban exiles has required two things: a Republican registration card and a hard line toward the Castro regime. So when Joe Garcia became the first Cuban-American Democrat from the state to win election to the House in 2012, it signaled a crack in a critical GOP constituency.

Some Republicans and Cuban-American lawmakers are criticizing President Obama for shaking President Raúl Castro’s hand at the memorial service for Nelson Mandela. Their reaction to a gesture of common courtesy should come as no surprise given Washington’s senseless commitment to a failed 50-year policy toward Cuba.