New Delhi, April 25 (ANI): Bharatiya Janata Party (BJP) MP Gautam Gambhir on April 25 slammed Delhi Chief Minister Arvind Kejriwal by saying Delhi CM is doing “low-level politics” over oxygen crisis and making people suffer in national capital. “What was your (Delhi CM) backup plan? Why did you not do anything in one yr? Now you write letters to all CMs for Oxygen. What happened to the 8 oxygen plants that you were setting up? You set up only 1. It's low-level politics that is making people suffer,” Gambhir told ANI.