Obama does not want to change the U.S. political and economic system, but "in spite of that, the extreme right hates him for being African-American and fights what the president does to improve the deteriorated image of that country," Castro wrote.
"I don't have the slightest doubt that the racist right will do everything possible to wear him down, blocking his program to get him out of the game one way or another, at the least political cost," he said.
Castro, who writes regular commentaries for Cuba's state-run media, has criticized Obama, complimented him occasionally and said that he is watching him closely to see if he means what he says about changing U.S. policy toward Cuba.
Castro has been writing columns for Cuba's state run press even as his participation in Cuba's political affairs has scaled down. Castro has been striking a notably conciliatory tone since Obama has taken office. The Obama administration has drastically curtailed the criticism of Cuba's communist government, in marked contrast to previous administrations that put up billboards and beamed broadcasts at Cuba providing news that is blacked out in the state media.