Yes, there is ... all the jobs that are indexed off the minimum wage. Who do you think makes the contributions to the RAT party, the minimum wage earners or the unions? See #4. There are also the liberal northeast states with their higher minimum wages tired of losing companies to states with lower minimums. A national standard helps to dampen that effect. Meanwhile, what was that teen unemployment rate in the inner cities again?
As the unions die, so does their ability to extort money from all union members to support the union bosses political friends.
Not just union money but union employees who 'volunteer' their time getting the vote out...