“…This trend would imply the possibility of ratifying a treaty since it would make it difficult to build convergence between the parties. Considering the previous debates on parties' ideologies and positions over the time (HUNTINGTON, 1997;LINDSAY, 1994;MAINWARING, 1986;MEERNIK, 1993;MILNER;TINGLEY, 2015;NELSON;TILLMAN, 1984;NYE, 1999;POPE;WOON, 2008;RICE, 2000;ROSATI;SCOTT, 2011), the institutional changes and the prospects for polarization starting in the 1970 (ALDRICH, 2011;ROHDE, 1991) and increasing in the post-Cold War (ORNSTEIN, 1992), we have investigated the following hypothesis: H1: The possibility of convergence between the Democratic and Republican parties tends to diminish when their positions on human rights treaties are anchored by ideological perspectives.…”