Krugman is an idiot. The end.
No, he knows what he is doing, the Marxist desire one of two things either overturn the election results or completely delegitimatize a Trump presidency. They would love to do the first and install Hillary as president. That is probably a "bridge to far" but that is the aim of the "HameltonDelegates". So next best thing is to make it impossible for Trump to govern by not accepting the election results and claiming he is not really the president. He cheated. That's why the left is doubling down on Russia did it.
You can expect to hear more of the same and louder from the Marxists.
The good news is that Trump knows exactly what's going on and that is why Trump still acting like he is in campaign mode. He is in fact in a campaign, a campaign to sell himself as the legitimate president of the USA.