Trend in Union Membership in the United States

This assignment must be completed in APA FORMAT with IN-TEXT CITATIONS.. This paper requires a 1200 WORD REQUIREMENT and MUST include a REFERENCE PAGE. NO PLAGIARISM! This MUST be submitted to me by March 19, 2020 at 10:00am (CENTRAL TIME). THIS MUST BE SUBMITTED ON TIME! NO EXCEPTIONS!

What has been the trend in union membership in the United States, and what are the underlying reasons for the trend?