I'm not sure the overton window applies too much to economic policy in the US at this point; it's essentially hardline liberal capitalism in the Democrats, and liberal captalism with a kleptocracic chaser in the Republican party. Like I said, the entire US political system is united in its unquestioning faith in liberal capitalist economics, the window is very narrow. Democrats will make overtures towards unions, but will never step up to support them when it comes to policy.

As for social policy, it is heading to the right, gaining momentum in the years leading to Trump and making steady gains since. I would characterize the social overton window in the US as the Democrats nailing the left end of the window the wall and Republicans systemically dragging the right end further and further right.