Not so. Wickard was decided in 1942, not long after Wrightwood Dairy.
Ya gotta watch him.
I don't have access to the case details from here, but I'll look into it.
If it is prior to Wickard, it is not by much, and basically involves the same federal expansion of power under the New Deal Commerce Clause as Wickard.
I question the motives of anybody claiming to be a political conservative while defending that doctrine and that interpretation of the Constitution.