Administrative
Agency rulemaking that election contributions must be for the purpose of furthering electioneering electoral communications was a permissible and persuasive exercise of authority.
Not A&C.
Bonus: odd Yeats quote in peroration.
https://www.cadc.uscourts.gov/internet/opinions.nsf/E90D7BF9ECC39D1085257F41006AF4EC/$file/15-5016-1594896.pdf
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.