Who is behind attack mailers and digital ads in Lehigh Valley primary elections? Here is what we know.

Who is behind attack mailers and digital ads in Lehigh Valley primary elections? Here is what we know.

Allentown and Bethlehem’s normally sleepy local election races are seeing tens of thousands of dollars poured in from outside groups seeking to influence which candidates voters will choose in the May 20 primary. While some of these groups have campaign finance disclosures that list the donors behind the ads, at least one is a so-called “dark money” group that is not required to disclose its donors. “We are seeing this happen more,” said Muhlenb…