Trade relations also deteriorated in equal measure. In 1962, President Kennedy broadened the partial trade restrictions imposed after the revolution by Eisenhower to a ban on all trade with Cuba, except for non-subsidized sale of foods and medicines. A year later travel and financial transactions by U.S. citizens with Cuba was prohibited. The United States embargo against Cuba was to continue in varying forms. Despite tensions between the United States and Cuba during the Kennedy years, relations began to thaw somewhat after the Cuban Missile Crisis. Back channels that had already been established at the height of tensions between the two nations began to expand in 1963. Though Attorney General Robert Kennedy worried that such contact would hurt his brother's chances of re-election, President John Kennedy continued these contacts resulting in several meetings U.S ambassador William Atwood and Cuban officials such as Carlos Lechuga. Other contacts would be established directly between President Kennedy and Fidel Castro through media figures such as Lisa Howard and French reporter Jean Daniel days before the Kennedy Assassination with Castro stating "I am willing to declare Goldwater my friend if that will guarantee Kennedy's re-election".