Obama has stacked the deck. He has made it possible for unions to win elections with a minority of votes.
Delta and Northwest Airlines merged recently. Northwest is unionized. Delta is not.
Delta's "pay and benefits are 10 percent to 15 percent above those of unionized employees who had worked for Northwest and have been for years." (Polipundit article below)
After losing several elections, the unions will be allowed to rerun them because of rule changes by Obama's National Mediation Board.