WASHINGTON, Oct 22 (Reuters) - The new Democratic leadership of the U.S. securities watchdog has a message for Corporate America's highly paid executives: if your company screws up, your pay is at risk. Clawing back compensation is shaping up to be a key part of the U.S. Securities and Exchange Commission's (SEC) agenda as it cracks down on corporate misconduct, raising the stakes for thousands of executives who could potentially lose millions of dollars in bonuses and stock sale profits...