Energy Minister Rocio Nahle said on Twitter she would respect the Supreme Court decision, then pointed to a draft bill Lopez Obrador sent to Congress this week that aims to change the electricity industry rules for the CFE's benefit.
Mexico City has been in a state of maximum alert since mid-December, with more than 90 percent of hospital beds full due to soaring infections. Non-essential activities have been suspended in the capital.
Mexico has received two shipments of vaccine from Pfizer, and Lopez Obrador said the drugmaker would provide enough vaccines for about 700,000 to 750,000 people by March.
Leftist leader Lopez Obrador, who has vowed to prioritize the poor in a country with huge wealth disparity, has said the previous minimum salaries were shameful.