President Trump has taken an unconventional approach to trade negotiations by sending form letters to foreign leaders.

As President Trump ramps up the pressure on dozens of countries, trade experts fear U.S. tariff policy leaves consumers and businesses in limbo.

The S&P 500 closed slightly higher on Monday after President Donald Trump signaled he was open to negotiating trade agreements, including with key partners like the European Union. The comments boosted investor confidence that a global trade war could still be avoided.

Wall Street is pointing lower before the opening bell with new tariffs announced for Europe and Mexico and as the unofficial start of earnings season get under way this week. Futures for the S&P 500, Dow Jones Industrial Average and Nasdaq each retreated by about 0.3% early Monday.

President Trump opened his remarks alongside NATO Secretary-General Mark Rutte in the Oval Office on Monday by threatening "severe tariffs" against Russia.

Steep tariff rates are set to go back into effect after a 90-day pause on the April 2 rates that rocked the stock market.

President Donald Trump announced new tariffs on imports from the European Union (EU) and Mexico, aiming to improve trade deals and national security, while economists warn of potential price increases.

The European Union has decided to hold off on imposing retaliatory tariffs on U.S. goods that were set to begin Monday.