Delaware's short-selling senator thinks the practice is fine so long as predators don't step in and create another Bear Stearns or Lehman Brothers-type crisis.Sen. Ted Kaufman, a member of the Judiciary Committee and the man who took Vice President Joe Biden's seat in the upper chamber, told CNBC he hopes regulations expected to be announced today target those who sell stock short without actually possessing it and in the process create market havoc.