https://www.nytimes.com/2008/07/15/us/politics/15text-obama.html?utm_source=substack&utm_medium=email
https://www.whitehouse.gov/wp-content/uploads/2019/03/ERP-2019.pdf
https://theconversation.com/el-respaldo-popular-de-lopez-obrador-un-dato-clave-para-saber-quien-sera-la-primera-presidenta-de-mexico-220416