True, it's not entirely new. But re-defining concepts that are fundamental to democracy has bad consequences. Jan-Werner Müller has written about this in his book "Democracy Works":
“Now, it’s true that populists, when in opposition, criticize sitting governments (and, usually, also other parties). But, above all, they do something else, and that is crucial: in one way or another, they claim that they, and only they, represent what they often refer to as the “real people” or also the “silent majority.”
At first sight, this might not look particularly nefarious; it does not immediately amount to, let’s say, racism or a fanatical hatred of the European Union or, for that matter, the declaring of judges and particular media “enemies of the people.” And yet this claim to a distinctly moral monopoly of representation has two detrimental consequences for democracy. Rather obviously, once populists assert that only they represent the people, they also charge that all other contenders for office are fundamentally illegitimate. This is never just a matter of disputes about policy, or even about values; such disagreements, after all, are completely normal and, ideally, even productive in a democratic polity. Rather, populists assert that their rivals are corrupt and simply fail to serve the interests of the people on account of their bad, or indeed “crooked,” character. ”