Well, the Fed is not exactly part of the Gov't. In theory it is separate, but in practice it is more connected. The president can do certain things through executive order, to try and spur economic growth, but there is no guarantee it will work, or for how long. The simple fact is that the way the global financial/monetary system works, basically guarantees cycles of growth, followed by recessions.

There are a few cycles. The 10 year cycle, which is the basic growth cycle, then there is a generational cycle, which is based on major population generations, and when they become earners or start retiring etc. because if causes certain spending habits to change on a large scale, like everyone in a specific generation starting to buy houses and have kids, which comes with a ton of economic activity. Then there is the long term debt cycle, which is more like 70-100 years, and involves bigger economic trends that also include sovereign debt, and the stability of nations as a whole.

There are things that can be done to delay the cycles to an extent, but you can't prevent them from happening, because it all ties into how money and debt works. Watch the video, and you will understand a lot more.