Aristegui hosted the program Hoy por Hoy ("Nowadays") on W Radio until 4 January 2008, when, after several months that had been marked by increased tensions between herself and her employers about the extent to which she should be allowed to express certain opinions, she parted ways with the network, citing differences over its planned changes in editorial direction. "
Early in December 2007," Aristegui said, "I was informed of the network's desire not to renew my contract, but they left open the possibility of staying on.
The network notified me that they sought to change the contractual conditions in some respects, incorporating some changes in editorial direction...We discussed it and looked forward to specific proposals, but in the end it didn't happen."
In her final broadcast, she said that she had been surprised by the news of her termination.
The split coincided with the March 2007 appointment of Daniel Moreno, who was close to the wife of Zavala and former president Vicente Fox's wife Marta Sahagún, as director of W.  Though Hoy por Hoy had attained its highest audience levels ever with Aristegui at the helm, beginning in 2007, Aristegui was conspicuously omitted from the list of electronic journalists who were granted interviews with the Mexican president.

On 5 January 2008, La Jornada reported that after the show's final broadcast, Aristegui received applause from station workers, lasting for several minutes.
Hosts of the stations Ke-Buena, Los 40 Principales and Bésame Mucho, which broadcast from the same building, also gathered there to applaud the journalist's work.
Outside, listeners gathered spontaneously to protest Aristegui's firing, some of them carrying signs reading "Long live our right to information!", "
We will not be silenced!
Long live our freedom of expression!"
and "Carmen, we are with you, because Mexico needs valiant and principled journalists like you."

Voces Silenciadas ("Silenced Voices"), a 2009 documentary by Maria del Carmen De Lara about the persecution of journalists in Mexico and the relationship between the Mexican media and politicians, used Aristegui's departure from W Radio as its starting point.
De Lara stated publicly that the Aristegui case showed how concentrated media ownership in Mexico had narrowed the range of permissible opinions in Mexico's media.
Aristegui hosted the program Hoy por Hoy ("Nowadays") on W Radio until 4 January 2008, when, after several months that had been marked by increased tensions between herself and her employers about the extent to which she should be allowed to express certain opinions, she parted ways with the network, citing differences over its planned changes in editorial direction. "Early in December 2007," Aristegui said, "I was informed of the network's desire not to renew my contract, but they left open the possibility of staying on. The network notified me that they sought to change the contractual conditions in some respects, incorporating some changes in editorial direction...We discussed it and looked forward to specific proposals, but in the end it didn't happen." In her final broadcast, she said that she had been surprised by the news of her termination. The split coincided with the March 2007 appointment of Daniel Moreno, who was close to the wife of Zavala and former president Vicente Fox's wife Marta Sahagún, as director of W.  Though Hoy por Hoy had attained its highest audience levels ever with Aristegui at the helm, beginning in 2007, Aristegui was conspicuously omitted from the list of electronic journalists who were granted interviews with the Mexican president.
On 5 January 2008, La Jornada reported that after the show's final broadcast, Aristegui received applause from station workers, lasting for several minutes. Hosts of the stations Ke-Buena, Los 40 Principales and Bésame Mucho, which broadcast from the same building, also gathered there to applaud the journalist's work. Outside, listeners gathered spontaneously to protest Aristegui's firing, some of them carrying signs reading "Long live our right to information!", "We will not be silenced! Long live our freedom of expression!" and "Carmen, we are with you, because Mexico needs valiant and principled journalists like you."
Voces Silenciadas ("Silenced Voices"), a 2009 documentary by Maria del Carmen De Lara about the persecution of journalists in Mexico and the relationship between the Mexican media and politicians, used Aristegui's departure from W Radio as its starting point. De Lara stated publicly that the Aristegui case showed how concentrated media ownership in Mexico had narrowed the range of permissible opinions in Mexico's media.
Carmen Aristegui