Organized labor has given more than $1.3 billion to Democratic Party organizations and liberal nonprofit and activist groups since 2010, while 1 percent went to conservative groups or causes, according to a survey of federal data.

The giving is starkly different from the beliefs of most rank-and-file union members, many of whom lean Republican.

Recommended Stories

Democrats hope to undo bipartisan 2014 fix for troubled pension plans

Unions step up push for $15 minimum wage in Congress

Union leaders struggle to turn members against Trump