Tax experts say the international tax treaty, which Republicans strongly oppose and requires a two-thirds majority in the US Senate to pass, faces significant challenges. Without US ratification, meeting the OECD tax deal's implementation conditions to reshape the global tax system becomes extremely difficult. The international tax treaty's implementation needs acceptance by 30 jurisdictions and the inclusion of the headquarters jurisdictions of at least 60% of the most profitable multinationals; given that many of these businesses are located in the United States, US participation is critical to attaining this level.
