What differences between older and newer unions tended to cause tension within the labor movement?

this isn't a question and if you're going to list things be kind and use commas.

interest groups send representatives to state capitals and to washington, d.c. to put pressure on members of congress and other policymakers. they engage in lobbying, or the organized process of influencing legislation or policy. lobbying can take many forms. interest groups can testify in congressional hearings.