Jim Cramer says Nvidia chips could give the U.S. leverage in the trade war with China

1. Nvidia could provide U.S. leverage in the trade war with China. 2. Cramer calls Nvidia the 'one ace in our hand' amid trade tensions. 3. New U.S. regulations on Nvidia could result in significant financial losses. 4. Many U.S. companies are dependent on Chinese manufacturers amidst trade tensions. 5. Cramer emphasizes urgent need for tougher negotiation from Trump's administration.