Teague, Aileen. 2019. “The United States, Mexico, and the Mutual Securitization of Drug Enforcement, 1969–1985.” Diplomatic History 43 (5): 785–812.
This academic journal is about the United States’ and Mexico’s efforts regarding the drug war and drug trade. Among the various themes covered, the most useful to my research are: the response Mexico had towards the drug control policies that the United States implemented, The political violence that these policies brought, and factors that contributed to the militarization of both regions. The author’s use of primary sources to back up their argument and the use of secondary sources to strengthen them is remarkable. This source is useful when trying to measure the impact that US policies have had in Mexico and its people.

Hunt, Edward. “Staying the Course in Mexico: The Role of the US in the Drug War, 2006–present.” Third World Quarterly, vol. 40, no. 6, June 2019, pp. 1184–1205.
The author argues that the Merida Initiative was one of the main factors that contributed to the violence. The Merida Initiative was a multi billion dollar US assistance that, after its put into effect, drug related violence increased, when replaced in 2012 there was an observable decrease in violence, and when a similar program was brought again, the violence increased again. Although the article does make a lot of speculations, it does make a good job at backing up their argument with credible evidence. This source is perfect when looking directly at the impact that the US had in Mexico with a specific policy.