On 4 February 2011, on her MVS program, Aristegui reported an incident that had occurred on the previous day in the Chamber of Deputies.
 Opposition deputies had displayed a banner reading: "Would you let a drunk drive your car?
No, right?
So why let one run your country?"
Aristegui commented on her news program that while she didn't "have any specific information" as to whether the president had problems with alcohol, she added "this is a delicate topic" and suggested that President Calderón had an obligation to reply to the charge.
On 7 February MVS, citing Aristegui's comments, terminated her contract purportedly "for violating the ethical code" of the firm. "
In our code of ethics," MVS said in a statement, "we pledge to reject the presentation and dissemination of rumors as news.
The journalist Carmen Aristegui violated our code of ethics and we decided to terminate our existing contractual relationship."
The termination resulted in widespread public protests, and Aristegui was reinstated a few days later.
 Neither she nor MVS Radio issued an official statement about her return to the air.

A CNN report in August 2012 revealed the behind-the-scenes story of the firing and rehiring.
On 4 February, shortly after Aristegui's on-air comments about President's Calderón's possible alcoholism, MVS president Joaquin Vargas received a phone call from Calderón's spokeswoman, Alejandra Sota.
Vargas apologized for Aristegui's comment, and later that day was told by a cabinet official that the government would not be taking action on a matter involving MVS's broadcast frequencies until Aristegui herself offered a public apology.
On 5 February, Sota handed Vargas a statement of apology and told him to instruct Aristegui to read it on the air.
On 6 February, Aristegui refused; Vargas fired her immediately.
Her termination was announced that evening, and within hours Sota phoned Vargas and told him she was alarmed by the intense reaction on social networks to the news of Aristegui's dismissal.
After several days of public outcry and of extensive communication between Vargas and various representatives of Calderón, Aristegui returned to the air on February 21.
On 4 February 2011, on her MVS program, Aristegui reported an incident that had occurred on the previous day in the Chamber of Deputies.  Opposition deputies had displayed a banner reading: "Would you let a drunk drive your car? No, right? So why let one run your country?" Aristegui commented on her news program that while she didn't "have any specific information" as to whether the president had problems with alcohol, she added "this is a delicate topic" and suggested that President Calderón had an obligation to reply to the charge. On 7 February MVS, citing Aristegui's comments, terminated her contract purportedly "for violating the ethical code" of the firm. "In our code of ethics," MVS said in a statement, "we pledge to reject the presentation and dissemination of rumors as news. The journalist Carmen Aristegui violated our code of ethics and we decided to terminate our existing contractual relationship." The termination resulted in widespread public protests, and Aristegui was reinstated a few days later.  Neither she nor MVS Radio issued an official statement about her return to the air.
A CNN report in August 2012 revealed the behind-the-scenes story of the firing and rehiring. On 4 February, shortly after Aristegui's on-air comments about President's Calderón's possible alcoholism, MVS president Joaquin Vargas received a phone call from Calderón's spokeswoman, Alejandra Sota. Vargas apologized for Aristegui's comment, and later that day was told by a cabinet official that the government would not be taking action on a matter involving MVS's broadcast frequencies until Aristegui herself offered a public apology. On 5 February, Sota handed Vargas a statement of apology and told him to instruct Aristegui to read it on the air. On 6 February, Aristegui refused; Vargas fired her immediately. Her termination was announced that evening, and within hours Sota phoned Vargas and told him she was alarmed by the intense reaction on social networks to the news of Aristegui's dismissal. After several days of public outcry and of extensive communication between Vargas and various representatives of Calderón, Aristegui returned to the air on February 21.
Carmen Aristegui