A New Jersey congressman is under fire for singling out a bank’s lawyer, based on her political affiliations, in a letter to her boss—apparently leading to her departure.

In a complaint filed with the Office of Congressional Ethics May 16, the nonprofit group Campaign for Accountability claimed that a fundraising letter from U.S. Rep. Rodney Frelinghuysen, R-Morris County, to Lakeland Bank board member Joseph O’Dowd—alerting him that the bank’s general counsel, Sally Avelenda, was politically opposed to O’Dowd—violated House ethics rules.