It's like they are stalking an ex-lover.
I think they miss him terribly. When Bush was president, they didn't like anything the government was doing, they were miserable and they had someone to blame their misery on. They had someone to vent their anger on.
Now they are still just as angry and miserable, but they can't blame the government or the president. It's going to get harder and harder for them the further we get, in time, away from the Bush administration.