US stocks fell across the board on Tuesday as President Donald Trump's revived tariff threats and potential toughening of China curbs weighed on market optimism and the chances of interest rate cuts. Consumer confidence also plummeted in February, notching its biggest monthly decline in more than four years as 12-month inflation expectations jumped and recession fears escalated. The tech-heavy Nasdaq Composite (^IXIC) fell around 1.6% on the heels of a tech-led sell-off on Monday. The benchmark S&P 500 (^GSPC) dropped roughly 0.7%, while the Dow Jones Industrial Average (^DJI) fell about 0.1%. The biggest move in markets early Tuesday, however,…