In Ohio, Third-Party Candidates Could Tilt Election

By your logic, no crimes should be prosecuted.  Not homicides, not robberies, not nothin'.

To begin with, it wouldn't be Obama spending his time -- It would be government offices charged with enforcing the rule of law.

That's how a government based on the rule of law (as opposed to the rule of man/person/royalty/president) operates - By enforcing the laws.  

There really is no question about this, nor is it a matter of choice.  Each branch of government must be diligent in keeping the other branches in check.  You prevent an executive branch's abuse of its power by holding it to account.  If you don't, you no longer have a democracy.
Read the Article at HuffingtonPost