During the great recession of 2007-2009, did the US government take a page of the Keynesian macro theory (using monetary and/or fiscal policy to stimulate the aggregate demand and the economy) to help move the country out of recession? Can you give an example of what policymakers did? Did it work? How about the 2020 recession resulting from the coronavirus pandemic (COVID 19), did policymakers use similar policies? Can you give an example? Were you in favor or against such polices when they were first applied?