Here’s the thing. The US President USUALLY has minimal effect on the economy in good or bad ways. But the media insists that we evaluate everything instantly with hot takes, and it’s become a cultural instinct. Biden was trying to take credit for the good things in the economy he had nothing to do with, so he doesn’t really get to whine about getting the blame for the bad things he has nothing to do with.
On inflation, there’s alot of factors, but the Fed is the main culprit. Every central bank on Earth pumped out massive amounts of money during covid, and so we all have way more money chasing fewer goods (due to the economic slowdowns). Sure, there are other factors too, but this is the big one.
Is Biden to blame? A little. He has been engaged in fiscal blowouts, and that drives the Fed to print more money to finance it. But so did Trump, and so did Obama before him, and Bush before him. Turns out, both parties really really, REALLY like deficit spending. Democrats talk about taxes, but never really want to deliver. Republicans talk about spending cuts, but never really want to deliver. That money needs to be financed, and the bipartisan secret is that they both expect the Fed to fill that role. And it does.