Oct 6 (Reuters) - MDC Partners Inc MDCA.O :
* MDC PARTNERS CONFIRMS PROGRESS IN DISCUSSIONS OF POTENTIAL BUSINESS COMBINATION WITH STAGWELL
* MDC PARTNERS - INTENDS TO WITHDRAW REGISTRATION STATEMENT AND PRELIMINARY PROXY STATEMENT/PROSPECTUS, FILED ON AUG 31
* MDC PARTNERS INC - EXPECTS U.S. DOMESTICATION TO BE CONSIDERED IN CONJUNCTION WITH POTENTIAL TRANSACTION