Raises all sorts of concerns...
In a post-Citizen's United world this is now considered fair play in poltics...
Secret Donors Finance Fight Against Hagel
"A brand new conservative group calling itself Americans for a Strong Defense and financed by anonymous donors is running advertisements urging Democratic senators in five states to vote against Chuck Hagel, President Obama’s nominee to be secretary of defense, saying he would make the United States “a weaker country.”
Another freshly minted and anonymously backed organization, Use Your Mandate, which presents itself as a liberal gay rights group but purchases its television time through a prominent Republican firm, is attacking Mr. Hagel as “anti-Gay,” “anti-woman” and “anti-Israel” in ads and mailers.
Those groups are joining at least five others that are organizing to stop Mr. Hagel’s confirmation, a goal even they acknowledge appears to be increasingly challenging. But the effort comes with a built-in consolation prize should it fail: depleting some of Mr. Obama’s political capital as he embarks on a new term with fresh momentum.
The media campaign to scuttle Mr. Hagel’s appointment, unmatched in the annals of modern presidential cabinet appointments, reflects the continuing effects of the Supreme Court’s 2010 Citizens United decision, which loosened campaign finance restrictions and was a major reason for the record spending by outside groups in the 2012 election. All told, these independent and largely secretly financed groups spent well over $500 million in an attempt to defeat Mr. Obama and the Democrats, a failure that seemed all the greater given the huge amounts spent."