The Obama campaign broke the law on millions in undisclosed donations, paid a massive fine, and it was never talked about again
https://www.usnews.com/news/articles/2013/01/07/obama-campaign-fined-big-for-hiding-donors-keeping-illegal-donations
https://www.usnews.com/news/articles/2013/01/07/obama-campaign-fined-big-for-hiding-donors-keeping-illegal-donations
US News & World Report
Obama Campaign Fined Big for Hiding Donors, Keeping Illegal Donations
The FEC levied one of its largest fines ever against Obama's campaign committee, new documents show.