Labor spending on state races more than doubled since the 2004 elections.
According to campaign finance reports, six unions spent about $2.2 million on contributions and independent expenditures for campaigns for state office in 2004.
That's less than half the $4.7 million spent this year.
Here's a breakdown:
Service Employees International Union: $1.5 million
N.C. Association of Educators: $272,803
International Brotherhood of Teamsters: $198,150
National Education Association: $149,000
International Brotherhood of Electrical Workers: $40,000
State Employees Association of N.C.: $35,059
N.C. chapter of the AFL-CIO: $8,000
UNITE HERE: $5,000
United Auto Workers: $600
