If not, you might whiff your first clue if you go and stand downwind of the White House. The demise started seven years ago when the Clinton corruption began to gnaw away like a malignant cancer on the Democrat body politic. Already sick from the malaise of decades of anti-Americanism, rot was beginning to set in and things were beginning to get, shall we say, ripe. Slick Willie, an example of liberalism on steroids, demonstrates what happens when personal sociopathy is left unrestrained by leftist ideology. By doing nothing about Clinton's corruption, the Democrats proved beyond doubt that liberalism is a failed ideology.
Liberal ideology embraces no moral absolutes.
The only values are relative, free floating from one convenience to another. Liberals don't know what to do when one of their own runs amuck. Or maybe they do and opt for the easy way out. If, It Takes a Village, an individual can never be blamed when things go wrong. When a liberal commits a crime it's poverty's fault.