Is it actually prompting any soul searching, though? To be sure, those who were already inclined toward supporting The Squad™ are now getting more vocal about it, but we're also seeing a huge amount of people actively cheering the government on for rounding people up and putting them into cages and sending people to prison camps without due process. (I can't find the source, I'm sorry, but) I saw something recently that said well above 60% of USians support government policies that help the poor, but that drops to about 30% if you call the same policies "welfare". [Edit: found the source here.]
I think Zizek's qualified support for Trump's first term was a gamble that the US would then look at the consequences and then resolve to have to grow up and start taking politics more seriously. And I think that gamble was silly, both because of how the US currently is, and because of how often that hasn't worked in the past 100 years. And that, amongst other reasons, is why I generally take what Zizek has to say with a pinch of salt.
Fairly unsurprising conclusion, really.