What factors may influence the President's decision to establish an Inter-State Council?
The factors that may influence the President's decision to establish an Inter-State Council, as per the given context, are:
1. Inquiring into and advising upon disputes which may have arisen between States.
2. Investigating and discussing subjects in which some or all of the States, or the Union and one or more of the States, have a common interest.
3. Making recommendations upon any such subject and, in particular, recommendations for the better co-ordination of policy and action with respect to that subject.