Lakhimpur case: Is someone shielding Union minister Ajay Misra?

As Congress leaders led by party general secretary Priyanka Gandhi Vadra stage a silent protest, demanding the dismissal of Union minister Ajay Mishra in connection with the Lakhimpur Kheri violence, we raise these questions: Is Ajay Misra's continuance as minister untenable?
Why is govt reluctant to drop Ajay Misra? Is someone shielding Ajay Misra? Has caste card helped Misra survive in the govt?