By Ross Kerber (Reuters) -A top Glass Lewis executive said the firm may register itself as a U.S. investment ​adviser, which would subject it to more regulation but potentially assuage criticism ‌from corporate executives and Republican politicians over its proxy voting recommendations. "We're seriously considering registration as ‌an investment adviser" with the Securities and Exchange Commission in Washington, Glass Lewis Chief Strategy Officer Cheryl Gustitus told Reuters in an interview on Friday. G ...