The main purpose of the PROTECT Act of 2025 is to enhance oversight of foreign investments in the United States, specifically focusing on investments from countries deemed to be a concern for national security. This legislation aims to ensure that any significant foreign investments, particularly those involving the establishment of new businesses or facilities on U.S. soil, are thoroughly reviewed to prevent potential risks to the country. Key provisions of the Act include a broadening of the definition of what constitutes a "covered transaction" under the Defense Production Act.