When the economy is in a recessionary mode, what will likely be the actions by the government using fiscal policy?

Is it better to concentrate on aggregate demand or aggregate supply?Why?

How and why aggregate demand and aggregate supply shift inward and outward?

English economist John Maynard Keynes developed a model that provides an explanation for the high and prolonged rate of unemployment of the Great Depression. According to Keynes, what are the major sources of economic instability?

Fiscal policy is spending and taxation of the executive branch of the federal government; in recessionary times, what initiatives in spending and/or taxation are going to help the economy?