That's where AWS us-east-1 is, i.e. the oldest AWS region where they got started to begin with. Google and Microsoft also have a large presence there. It's not just the US government, it's everybody, and it's not new.
> How did they do it?
Here's the US nuclear plant map, guess where a bunch of them are:
https://www.eia.gov/todayinenergy/detail.php?id=65104
The area around Virginia is also a major coal producer and when this was getting started it was a source of cheap electricity, but coal is quickly being replaced with natural gas via pipelines from the Gulf coast. Their current power mix is ~30% nuclear, ~12% renewables (solar) and almost all the rest natural gas.
That's because you don't live in Maryland.
Our energy bills are through the roof and our transmission company is talking about rolling blackouts in 2027.
https://www.thebanner.com/community/climate-environment/cont...
EDIT
The opening paragraph:
> State regulators’ review of the controversial power line proposed to stretch across three rural Maryland counties will extend to at least February 2027, officials announced Thursday, a timeline that prevents developers from meeting the grid operator’s deadline to ensure reliable electricity.
If demand increases you have to build more generation and power lines etc. This is not a problem but for NIMBYs, it's just the logical consequence. If the local population increases and you don't have enough grocery stores you don't say "grocery stores are stressed" and regard it as an insurmountable problem, people just open more of them.