As of March 25, 2025, former President Donald Trump has announced and implemented several tariff measures aimed at reducing trade deficits, supporting American manufacturing, and addressing issues related to illegal immigration and drug trafficking. Below is a summary of these tariffs:

1. Tariffs on Steel and Aluminum Products

Since March 12, 2025, the U.S. has imposed a 25% tariff on all imported steel and aluminum products, revoking previous exemptions. This move has affected major trade partners such as Canada and the European Union, leading to retaliatory tariffs. (wsj.com)

2. Tariffs on Chinese Goods

On February 4, 2025, the U.S. imposed a 10% tariff on all imports from China, covering nearly all product categories. In response, China implemented retaliatory tariffs on U.S. goods. (wsj.com)

3. Tariffs on Mexico and Canada

The U.S. has announced a 25% tariff on imports from Mexico and Canada, though implementation has been delayed until April 2, 2025, due to the USMCA agreement. In response, Canada has announced countermeasures on $21 billion worth of U.S. goods, with additional tariffs worth $20.6 billion planned. (wsj.com)

4. "Secondary Tariffs" on Venezuelan Oil

Starting April 2, 2025, the U.S. will impose a 25% tariff on any country purchasing oil or natural gas from Venezuela. This measure targets major buyers such as China, India, Spain, and Italy, aiming to restrict Venezuela’s oil trade. (thetimes.co.uk)

5. Upcoming Sector-Specific Tariffs

Trump has announced plans to introduce new tariffs on industries including automotive, pharmaceuticals, lumber, and semiconductors, though details have yet to be finalized. (reuters.com)

In summary, Trump's tariff policies affect multiple countries and a wide range of products, aiming to leverage trade strategies for economic and political objectives.