Yeah, I probably grossly oversimplified that and forgot about a bunch of other factors. Stimulus was split about 50/50 between Trump and Biden. The ARP probably was a bit too large and contributed something like 1.5% to the eventual inflation spike. A lot of the inflation spike, though, was due to supply shocks, then energy shocks from Ukraine, then "revenge spending" demand shocks as society reopened with not enough goods and a lot of excess savings. Then we had the nascent AI tech hiring boom which was pushing up costs and housing in places like SF and Seattle. By 2024 we were well on our way into the current K-shaped economy with the hypersclar buildout driving inflation due to private sector spending (even in the face of the Fed hiking rates like crazy). Really it is likely that only about ~20% or less of the inflation under Biden was due to government spending.

It is true in 2024 that there was a hell of a lot of gaslighting going on that the economy was great for everyone and that we were having a "vibecession" and praising "Bidenomics" when the K-shaped economy was already appearing, and this DNC messaging effort clearly failed. But it also didn't have a lot to do with Biden, and arguably pushing the message that implicitly accepted that Biden was entirely responsible for the economic conditions of the previous 4 years was flawed and factually inaccurate messaging. Maybe it wouldn't have been possible to argue otherwise, but I do remember a lot of Democrats who argued that Trump's economy had relatively little to do with any of his policies in his first term. I similarly think that Biden had relatively little control over the economy in his term.

Currently, though, Trump pretty well owns this economy due to what his war with Iran is doing. He doesn't own the background of what is going on with AI and hyperscalar spending and the likely bubble and the inflationary pressure and K-shaped economy (although Republican tax cuts over the past 45+ years are cumulatively responsible for the K-shaped economy and Trump owns some of that), but Trump is doing his best to just pour gas over the economy and light it all on fire.