HAVANA — Cuba on Friday rejected any suggestion that its political system or the term of its president were subject to negotiation in talks with the United States, following reports that Washington sought to remove Cuban President Miguel Diaz-Canel from power. "I can categorically confirm that ... the political system of Cuba is not up for negotiation, and of course neither the president nor the position of any official in Cuba is subject to negotiation with the United States," Vice Foreign Minister Carlos Fernandez de Cossio told a press conference. Cuba acknowledged a week ago that it had entered talks with the U.S. government as an oil blockade imposed by U.S. President Donald Trump pushes the Communist-run nation deeper into economic crisis, and as Trump has said he can do "anthing I want" with Cuba, a sovereign neighbor. USA Today, citing two sources with knowledge of the Trump administration's plans, reported before Cuba's announcement that Trump was preparing an economic deal with Cuba that would relax trade restrictions but include an "off-ramp" for Diaz-Canel. The New York Tim