what is an mnpl
MNPL Contributions. The Machinists Non-Partisan Political League (MNPL) is the political arm of the International Association of Machinists & Aerospace Workers. It was created in 1947 to allow IAMAW members to gather individual contributions, coordinate political activity, and elect candidates who support IAMAW members and their families. Only members of the IAM may make contributions to the MNPL. 1  Begin Here. 2  Please email mnplsupport@iamaw.org for assistance. 3  Note: Please avoid using commas in your donation amount. Decimals are OK. ie. 4  Your Information. 5  Your Lodge Information.