A prominent union boss warned on Wednesday that Democrats will pay for blocking the Keystone XL pipeline.
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“For every action, there’s a reaction, and our members’ reaction will be felt in the next election,” Terry O’Sullivan, general president of the Laborers’ International Union of North America (LIUNA), told PoliticoPro.

LIUNA, like many unions, gave generously to the Democrats during the midterm elections. The union gave more than $2.3 million to Democratic candidates and $920,000 to the party’s main super PACs for 2014.