In the Citizens United case last month the Supreme Court ruled that corporations could spend without limit in political campaigns. At the time...
[G]roups of corporations within an industry may form coalitions or use existing trade associations to support candidates favorable to policy positions that affect the group as a whole. While corporations that contribute to these expenditures might still be disclosed, this indirect approach can provide sufficient cover such that no single contributing entity receives the bulk of public scrutiny.So look for more advertising coming from cover groups and trade associations that are backed by big corporations who would prefer to avoid your notice.