Delaware's Corporate Charters
The Delaware General Assembly, can easily forbid corporate charters from making political contributions. This year. Simple majority vote.
"Delaware corporate charters may not donate to political campaigns."
Citizens United v. FEC. "the laws of some States ... ban ... corporate ... contributions to candidates"
https://www.opensecrets.org/news/2021/01/objectors-to-electoralcollege-donors/