India, March 26 -- As US President Donald Trump pushes for change in Cuba's leadership, speculation is mounting about who, if anyone, might replace Cuban President Miguel Diaz-Canel.

As Raul Castro's handpicked, largely figurehead successor in 2018, Diaz-Canel has been the only leader without the last name Castro to govern since the 1959 revolution. He still has two years left in his term, but some experts and a growing number of Cubans doubt he'll make it.

Two Castro cousins have come into focus as potential replacements, experts said. Oscar Perez-Oliva Fraga - Raul Castro's 55-year-old great-nephew - has shot to power since emerging from obscurity several years ago. He became minister of Cuba's influential Ministry of Foreign Trade an...