In a September 12, 2018 letter, 312 legislators—including Democrats as well as Republicans—from all 50 U.S. states wrote that they “strongly support” U.S. Trade Representative (USTR) Robert Lighthizer’s efforts to remove . In contrast, a May 2018 letter from in support of ISDS in NAFTA gathered the signatures of 12 state legislators only.
ISDS finds strong support among Republicans in the U.S. Congress. A group of 103 Republican senators and representatives signed a letter on March 20, 2018 calling on Lighthizer to maintain ISDS in NAFTA. In the letter, the lawmakers cautioned that excluding ISDS altogether or maintaining it in an opt-in system in a renegotiated NAFTA would “jeopardize Republican support” to the deal.