In the first case, tens of millions of reasonable people assumed that the system would work appropriately, as that's what we had been reassured of for months/years. In the second case, tens of millions of reasonable people have had the failure of the system amply demonstrated. The prevailing sentiment among establishment Democrats and Republicans alike is "this wasn't supposed to happen." That's hell on mandates. Under Bush, at least, it was "I guess this is a weird constitutional corner case." Remember: there are 318 million people in the United States. 63 million of them voted for Trump. Those that did are not well-represented in centers of commerce, governance or art - everyone wants to paint Trumpism as a populist uprising but the fact of the matter is, our electoral college favors the Hinterlands. The skew that brought him to office is the skew that has him excoriated in all popular media - the bulk of the country is not behind Donald Trump and don't let anyone tell you differently.