[5] In February 2014, Deputy Eréndira Montiel Jiménez from the Party of the Democratic Revolution (PRD) promised to introduce a partnership bill to the Congress of Tlaxcala.
The bill established an institution called sociedad de convivencia solidaria, which provides cohabiting same-sex and opposite-sex couples with many of the rights and obligations of marriage.
"[14][15] Deputy María Antonieta Stankiewicz Ramírez from the Institutional Revolutionary Party (PRI) announced that a same-sex marriage bill would be debated in a Congress committee sometime in July 2016, though no vote happened.
[17] The July 2018 elections resulted in the National Regeneration Movement (MORENA) and the Labor Party (PT) winning the majority of legislative seats in Congress.
[18] In October 2018, Deputy Miguel Ángel Covarrubias Cervantes from the Party of the Democratic Revolution introduced a same-sex marriage bill to Congress.
[21][22] The law amended article 42 of the Civil Code to read:[23] The following table shows the number of same-sex marriages performed in Tlaxcala since 2021 as reported by the National Institute of Statistics and Geography.
[24] A 2017 opinion poll conducted by Gabinete de Comunicación Estratégica found that 51% of Tlaxcala residents supported same-sex marriage, while 48% were opposed.