The world needs a new source of energy, an unspillable source.

Can geothermal energy be an effective source in the United States?

Interested in why we don’t see geothermal plants built in the US… Is it because the energy extracted is too expensive, poor sites in the US, etc. Outside references to reliable reports, sources would be great, thanks!
Re: sources, I’d like references to sources because, not having a background in the area, I don’t know the best places to look. This questions isn’t for some sort of school project.