Basseterre: US Secretary of State Marco Rubio will seek to address Caribbean leaders' concerns about Cuba at a summit on Wednesday, as Washington ramps up pressure on the communist island fresh after removing Venezuela's president. Rubio, a Cuban-American who has spent his political career hoping to topple Havana's government, is also looking for sustained cooperation on Venezuela and troubled Haiti as he takes part in the summit of the Caribbean Community, or CARICOM, which does not include Cuba.