He can't actually believe that is a strictly true statement. I'd think that any Republican politician with an understanding of economics would have to believe that a president's policies are at best contributory rather than a distinct cause. I get it as messaging; if one believes that progressive taxation has side effects that cause inequality, then they'd want to gloss over things to blame the presidency for it. So, I tend to believe that most politicians have private meetings where they talk about what they actually think is going on, and then translate it into brain-deadening messaging for the public. But sometimes I wonder if for a lot of these politicians, how much of what they say is actually because of willful ignorance rather than messaging.
Like that guy with the snowball that argued against global warming, that almost definitely has to be chutzpah rather than stupidity, right? Like, he would understand the concept that just because a stock price spikes down, it could still be true that the stock market is going up over time. So he has to secretly understand the argument about global warming, right? And then we waste our time trying to explain how a snowball doesn't disprove anything, and he doesn't care because he already knows that. There's got to be a term more accurate than chutzpah for someone that deliberately lies and plays dumb, knowing they can get away with it.