There is no evidence that Republican Congresses or Republican Administrations spend less money than do Democrats. Reagan increased spending while cutting taxes, so he was popular; but, he blew up the national debt. Every Republican since has done the same thing, and that includes Trump and the Republican Congress. So if Democrats are tax and spend, they at least come closer to balanced budgets, while Republicans are "borrow and spend", and when their turn is done, Democrats have to fix the damage.

And as Science Duck said, JFK wanted to reduce the top bracket rate to 65%, not to less than half that, as Republicans propose.