Selwyn Duke, in the American Thinker, writes,
Leftists...could attempt to change the Constitution so that it reflects their agenda, but this is a long, drawn-out, difficult process that requires, of all things, actual public support for your aims. And its easier to change the courts and install ideological justices who will impose left-wing orthodoxy from the bench than the will of the subjects. Consider that liberals are ever trying to destroy tradition, as it stands in the way of progressivism. Consider that a consistent definition of liberalism one that epitomizes the modern left (those progressives) involves the desire to change the status quo. So what it means is that, by definition, a liberal who understands the Constitution cannot believe in it.