Question

How can you say India has a federal political system

Answer 1

yes,the political system of india has federal system because the constitution of india says india is federation of states that means states are not subordinate to the centre as both states and centre are given respective authority to make laws.so when state assemblies make laws within their jurisdiction centre cannot override with some exemptions.

Answer 2

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Yes, India has a federal polity because of these two features, dual polity (state and central government) and division of powers.