Gavin Newsom, the California governor considered a potential next-generation presidential candidate for the U.S. Democratic Party, has declared a legal battle head-on against the tariff policies of the prior president. 1  California's lawsuit against the former administration's tariff policies marks the first such action by any of the 50 U.S. states. 2  This lawsuit, coinciding with Newsom's political ambitions, is interpreted as a prelude to the 2028 presidential election and is expected to be a significant variable in the direction of U.S. economic policy.

On April 16th (local time), Governor Newsom stated vehemently on his social media platform X (formerly Twitter), "Donald Trump does not have the authority to unilaterally impose the largest tax hike in our lifetimes through his destructive tariffs." He declared, "We will see him in court," signaling a legal response to the tariff policies of the prior president. Furthermore, in a video, Governor Newsom asserted, "California is the largest manufacturing state and one of the largest trading partners in the world, and no state in modern American history has been more impacted by the largest tax increase in modern American history than the state of California," emphasizing the justification for the lawsuit.

In this lawsuit, California plans to argue that the International Emergency Economic Powers Act (IEEPA), the legal basis cited for the prior president's tariff policies, does not grant the president the authority to impose tariffs. While IEEPA authorizes the president to impose specific economic sanctions in the event of an 'unusual and extraordinary threat' to national security, foreign policy, or the economy, California contends that the prior president's tariff policies do not meet these legal requirements.

This lawsuit is gaining significant attention due to California's position as the largest economy within the United States. Home to Silicon Valley's high-tech companies and the largest agricultural production in the U.S., California accounts for approximately 14% of the U.S. Gross Domestic Product (GDP), with a population of 40 million. Its nominal GDP ranks fifth globally, following the United States, China, Germany, and Japan. Given this economic significance, California's lawsuit is expected to have a considerable impact on U.S. economic policy.

Governor Newsom stated, "The prior president's illegal tariffs are wreaking havoc on California families and businesses, our economy, increasing prices, and threatening jobs." He also argued that California businesses, including some 60,000 small-scale exporters, are suffering enormous damage due to these tariffs, underscoring the negative impact of the prior president's tariff policies on the California economy.

Bloomberg News has projected that Governor Newsom is likely to run in the next presidential election in 2028 after his second gubernatorial term ends in early 2027. This lawsuit can be interpreted as a strategic move by Governor Newsom to strengthen his standing within the Democratic Party and raise his political profile by establishing a confrontational stance against the prior president.

This lawsuit is expected to ignite legal debate over the prior president's tariff policies and spark in-depth discussions about the direction of U.S. economic policy. Furthermore, Governor Newsom's political actions are projected to be a significant variable in the competitive landscape within the Democratic Party leading up to the 2028 presidential election.