Since this particular driving law is a state issue, it takes away a state's right to set it by attaching the federal funding mechanism to this issue.  It basically forces a state to abide by the federal standard.

While I am for zero tolerance of drunk driving, each state needs to set that standard of blood alcohol content.  Individual citizens have the right to live in which ever state they desire.  If they want to live in a state with the .05 or lower standard, move there.  Stop eroding our freedoms!