And the president has enormous influence over what congress does (veto).

Of course everything is nuanced; the trend is merely interesting especially juxtaposed against people consistently voting for republicans for "economic" reasons.

That’s unless you have a Congress that lets the President usurp the pose of the purse that should be theirs and Supreme Court that rubber stamps everything he does

Where does threatening allies, tariffs and kidnapping foreign leaders fit into this?

He creates uncertainty and it’s hard to see how that helps the US economy.

And Congress is controlled by the president as overriding a veto is extremely difficult.

I'm not so sure either have much impact. Economic policy doesn't change much between administrations and Congress has been ineffective for a long time. Politics is mostly culture war things these days.

The Fed seems to be the big driver of the economy. Other than that, the government is moving things at the margins. Even Trumps tariff shenanigans don't seem to have rocked the boat much.

Except they have abdicated most responsibility, especially when the president is of the same party, for decades.

Many now talk like they work for the president.