Conduct an internet search and look for data on union membership today in the US. What is the status of union membership today?

Conduct an internet search and look for data on union membership today in the US. What is the status of union membership today? What are the experts saying about the need for the continuation of union activities today? Is there one segment of the workforce that perhaps still might need union protection? Compare and contrast ideas from two sources and then include your informed thoughts about union activity today.  Minimum of 200 words.  Must cite sources!