NEW : Cuba 's president says it is unthinkable if Cuba is n't at the next summit . NEW : Santos adds the summit can be a ` ` starting point '' for talks on illicit drugs . Obama says debate is fine , but insists legalization is n't an option in the U.S . `` This hemisphere is very well positioned in the global economy , '' he said . The United States wants strong relations with Latin America , Obama says .
NEW : Cuba 's president says it is unthinkable if Cuba is n't at the next summit . NEW : Santos adds the summit can be a ` ` starting point '' for talks on illicit drugs . Obama says debate is fine , but insists legalization is n't an option in the U.S . The United States wants strong relations with Latin America , Obama says .