Interesting. That's contrary to what I've read. But, if you'll read through my posting history here, I am always eager to explore those things that might be different from what I believe. In most cases, a dissenting view serves to strengthen my convictions because it leads to acquire more data from both sides.
However there are certainly exceptions so I welcome anything you have that shows Coolidge's part in laying the groundwork for the Great Depression.
For the record, I'll acknowledge Hoover's role in it. He had some definite RINO leanings (perhaps arising from his humanitarian work) and I think he meddled too much in the economy. That being said, had a second Hoover term had come to pass (albeit unlikely given the public's mood), there's no doubt that the Great Depression would not have been so "Great" nor so prolonged, both of which are decidedly the fault of Franklin Roosevelt's soft brand of Communism.
Please forgive the off-topic diversion into Hoover since I am indeed most anxious to get your thoughts on Calvin Coolidge.
My favorite Coolidge aphorism is “It is easy to see why legislatures spend money. There is plenty of it laying around and it doesn’t seem to belong to anyone.”
I think it was part of the old liberal line in historiography to blame Coolidge for being a “do nothing” president and not taking steps to avert a depression. This argument was most strongly argued by the New Deal proponents. But nearly all modern historians have revised this position and reject it. First, because they realize the New Deal itself didn’t do that. Second, because economists are now aware of data (previously unavailable) that reveal the international currency and monetary connections of the global market. Americans in the 20’s were largely isolationist after WWI and didn’t want to get involved in foreign affairs. But, as we all know now, that was a fantasy. Coolidge isn’t blamed by historians for not knowing what no one else could have known at the time.