John Swallow Makes Strong Case for Impeachment being Illegal

   Ahh, so Utah Attorney General John Swallow believes it is illegal to impeach him.
   I think he makes a strong case. 
   Swallow points to the language in the Utah Code saying impeachment can be for, "high crimes, misdemeanors, or malfeasance in office," and says that means committed criminal acts. Now, my thought has been that malfeasance can include not criminal acts, and can simply be misbehavior. 
   But, Wikipedia seems to disagree with me. It says malfeasance in office requires the commission of an unlawful act. I'm not sure Wikipedia's saying it's so, makes it so. I also note the Utah Legislature's counsel says the definition is open to interpretation since there is a shortage of direction from federal courts.
http://www.merriam-webster.com/dictionary/malfeasance
http://en.wikipedia.org/wiki/Malfeasance_in_office
http://utahpoliticalcapitol.com/2013/06/14/breaking-swallow-to-the-utah-legislature-impeaching-me-would-be-illegal/