Most Caribbean Community member nations plan to attend the Summit of the Americas, according to two sources familiar with the situation, as some leaders call for a boycott if Washington excludes its ideological adversaries in the region. Latin American leaders including Mexican President Andres Manuel Lopez Obrador have threatened to skip the summit, which starts on June 6 in Los Angeles, if the United States does not invite Venezuela, Cuba and Nicaragua. Thirteen of the 14 member nations of the group known as Caricom are planning to join the event, according to a senior Caribbean nation official and a Washington-based Caribbean advisor who have been involved in talks about the issue.