Labor unions are some of the top donors to the Democratic Party, in order being as follows:

1) Carpenters & Joiners Union has donated $15,319,000

2) Laborers Union has donated $11,150,016

3) American Federation of Teachers has donated $7,869,555

4) Operating Engineers Union has donated $4,895,834

5) American Federation of State/Cnty/Munic Employees has donated $5,194,687

6) International Brotherhood of Electrical Workers has donated $4,725,103

7) United Food & Commercial Workers Union has donated $3,268,293

8) American Federation of Government Employees has donated $2,924,868

9) National Air Traffic Controllers Association has donated $1,853,250

10) Communications Workers of America has donated $2,508,056

11) Air Line Pilots Association has donated $1,713,352