Have you read about the 2016 United States election interference? [1] Or the Russian probing of the US power grid? [2]
Russia has been attacking critical infrastructure in the US for years. This is at best an incredibly latent response from a government who in many cases welcomes these attacks.
[1] https://en.wikipedia.org/wiki/Russian_interference_in_the_20...
[2] https://www.nytimes.com/2018/07/27/us/politics/russian-hacke...