Peter Schweizer, author of the bestselling "Clinton Cash," is headed to Capitol Hill this week to tell senators and House members about his new book, out March 20, "Secret Empires: How Our Politicians Hide Corruption and Enrich Their Families and Friends."

Why it matters: According to publishing sources, "The book will expose vast corruption by top Washington figures who leverage their political power to enrich their family members and friends, often by helping grease deals with foreign entities."