Donald Trump's tariff regime has faced legal challenges, including a lawsuit from the New Civil Liberties Alliance (NCLA) on behalf of a Florida stationary company affected by a 20% import levy on China. The NCLA argues that the tariffs are harmful and that the President's use of the International Emergency Economic Powers Act (IEEPA) to impose them is unauthorized. The lawsuit highlights a lack of connection between the fentanyl epidemic and the tariffs. The NCLA is backed by conservative figures like Charles Koch and Leonard Leo, and the tariffs have negatively impacted the wealth of several billionaires, including Elon Musk, Jeff Bezos, and Mark Zuckerberg. There are signs of dissent among Republican voters regarding the tariffs, which could affect Trump's popularity.