US President Donald Trump swore his oath of office on Monday, ascending yet again to the head of the federal government. As widely expected, he signed a swath of executive orders on his first day, many aimed at upending existing policies and satisfying grievances, whether that's pulling the country out of membership of the World Health Organization or reversing the nation's clean vehicle policies. The Infrastructure and Investment Jobs Act of 2021 and the Inflation Reduction Act of 2022 were signature pieces of former President Joe Biden's term of office.