I believe the USA election was cyber attacked. Sidney Powell called it Cyber Pearl Harbor which obviously represents an attack by a foreign actor or actors. https://www.sgtreport.com/2020/12/more-from-sidney-powell-dominion-smartmatic-and-china-involved-in-a-cyber-pearl-harbor-in-the-2020-us-election/

I started researching the DOD law of war manual for to learn more about US retaliation to cyber attacks. https://archive.defense.gov/pubs/law-of-war-manual-june-2015.pdf

16.3.3.5 Authorities Under U.S. Law to Respond to Hostile Cyber Acts. Decisions about whether to invoke a State’s inherent right of self-defense would be made at the national level because they involve the State’s rights and responsibilities under international law. For example, in the United States, such decisions would generally be made by the President.

I don't recall FDR filing a lawsuit in the Supreme Court to ask for permission to declare war on Japan.