President Donald Trump is confronting a sweeping legal battle that is unfolding over his administration's tariff policies, with states and major corporations filing a surge of lawsuits challenging the administration's authority to impose import taxes. The cases follow a Supreme Court ruling invalidating an earlier set of tariffs and now target a revised policy that critics argue repeats the same legal flaws, triggering a broader dispute over executive authority and raising the prospect of massive financial liabilities for the federal government.