 NEW YORK--BUSINESS WIRE--NASDAQ: MDCA MDC Partners Inc. MDC Partners or the Company announced today that Institutional Shareholder Services Inc. ISS, a leading independent proxy advisory firm, has reversed its prior voting recommendation. ISS now recommends that MDC Partners shareholders vote FOR the proposal to approve the combination of MDC with Stagwell Media LP, which is contributing Stagwell Marketing Group Holdings LLC Stagwell, at the Companys Special Meeting of Shar 