Former Hillary Clinton aide Mark Penn leaving Microsoft - POLITICO
Clinton's chief strategist steps aside
Mark Penn on building Stagwell, his political and polling background | Ad Age
Stagwell Group CEO Mark Penn on why it was time to buy a GOP firm | PR Week
Stagwell | Meet Mark - Stagwell
Why Old Clinton Sleazeball Mark Penn Loves Trump
Why we may be wrong about the internet - according to Mark Penn - CBS News
Microtrends Squared | Book by Mark Penn, Meredith Fineman | Official Publisher Page | Simon & Schuster
Stagwell CEO Mark Penn discusses second-quarter earnings report | Ad Age
Why Hillary's Former Operative Bought a Hollywood Box-Office Tracking Firm – The Hollywood Reporter
Mark Penn (@Mark_Penn) / Twitter
Mark Penn - Chairman and CEO - Stagwell | LinkedIn
Going Big On Media With Stagwell CEO Mark Penn | AdExchanger
Marketing Is the Answer Whether You're Growing or Struggling
Why Mark Penn Is Sounding Trumpy - POLITICO Magazine
Mark Penn (@Mark_Penn) / Twitter
Mark J. Penn | Meridian International Center
Mark J. Penn - The Stagwell Group
Mark Penn on building Stagwell, his political and polling background | Ad Age
Mark Penn | Milken Institute
Microsoft Battles Google by Hiring Political Brawler Mark Penn - The New York Times
Mark J. Penn | C-SPAN.org
Mark Penn: The man who blew the presidency | The Independent | The Independent
