It's not just leader responsible, it's leaders with an s. We live in a democratic republic for one which the fathers of our country intended to be decentralized power from the federal government (As read in The Federalists Papers). This directs power to be a bottom-up approach which starts at the city level.
Every single time you question the president, have you first questioned city, county and state leaders first? It is the local jurisprudence that must respond to its citizenship first with the federal government being the safety net in case all lower levels of government have failed. I can cite case examples, constitutional text and further jurisprudence evidence that indicates this is and was the intentional flow of government especially after the failure of the Articles of Confederation.