The US also has got enormous and inexhaustible (all together) coal mines, and oil fields of course. The price of natural gas is negative in some parts of Texas.
(we deployed about 1GW/day of solar on average globally in 2023, and this is expected to rise to ~2.7GW in 2024, reaching 1TW deployed annually; the US is also now one of the largest LNG exporters in the world)
But coal? Yikes. As you've said it, as gas is so cheap, perhaps use lots of gas and invest in renewables. But go coal-free.