Alan Gross was arrested four years ago Tuesday while working covertly in the Communist-run country to set up Internet access for the island's small Jewish community, access that bypassed local restrictions. At the time, he was working as a subcontractor for the U.S. government's U.S. Agency for International Development, which works to promote democracy on the island.
Cuba considers USAID's programs illegal attempts by the U.S. to undermine its government, and Gross was ultimately tried and sentenced to 15 years in prison. His case has become a sticking point in improving ties between the two countries, which have not had formal diplomatic relations since 1961.
"It is clear to me, Mr. President, that only with your personal involvement can my release be secured," Gross wrote in a letter made public through a spokeswoman.
Gross, 64, says he has "lost almost everything" over the past four years and that his family "has suffered tremendously." His wife has visited him while he's been in prison, where he says he spends 23 hours a day in a small cell with two other inmates, but Gross says he's asked his two daughters not to visit because he "cannot bear them seeing me like this." He has lost weight and suffers from arthritis. He says he is "completely isolated from the outside world" with the exception of a few phone calls and visitors.
"With the utmost respect, Mr. President, I fear that my government - the very government I was serving when I began this nightmare - has abandoned me. Officials in your administration have expressed sympathy and called for my unconditional release, and I very much appreciate that. But it has not brought me home," he wrote.
Gross isn't the only one urging Obama to get involved. In late November, 66 senators led by Sen. Patrick Leahy, D-Vt., sent Obama a letter asking him to "act expeditiously to take whatever steps are in the national interest" to obtain Gross' release. White House press secretary Jay Carney said in February that Obama has "followed Mr. Gross' case with concern and urges his release."
Gross' wife, Judy Gross, who now lives in Washington, also held a rally Tuesday in front of the White House, where she urged the president to "do whatever it takes to bring Alan home."
"Please, Mr. President, don't leave Alan to die in Cuba," she said to a crowd holding posters reading "Bring Alan Home."
Cuba has previously expressed a willingness to release Gross if the United States makes a similar gesture involving the so-called Cuban Five, intelligence agents who were sentenced to long jail terms in the United States in 2001. One of the men was released from prison in 2011 and was allowed to return to Cuba this year. A second is scheduled for release in February.
The United States has in the past rejected a trade, and the State Department in a statement Monday called on Cuba to release Gross "immediately and unconditionally." But Judy Gross said Tuesday that she believes the U.S. government should negotiate to bring her husband home. She said she does not know what the Cuban government wants in exchange.
Over the past year, U.S and Cuban officials have made some progress on repairing their relationship. U.S. and Cuban representatives met twice this year for renewed talks on re-establishing direct mail service, 50 years after it was stopped amid Cold War tensions. The two countries also resumed talks this year about migration issues. Both sets of talks had been on hold since Gross' arrest.