U.S. President Donald Trump has stunned global energy markets and rattled North American relations, claiming that India will begin buying Venezuelan oil instead of Iranian or Russian crude — and inviting China to strike a similar deal. Speaking to reporters aboard Air Force One, Trump also issued a sharp warning to Canada, threatening a “very substantial” response if Ottawa moves forward with a trade agreement with China. The moves spotlight a bold new U.S. strategy in oil geopolitics and trade — one that could reshape energy alliances and raise tensions with major world powers.