Answer: See explanation
Step-by-step explanation:
There are a number of reasons for the reduction in the power of unions in the last few decades.
One reason attributed to this is due to the shift in the composition of the economy of the United States. Nowadays, there are more people whom work in the service industries, and these sector usually have lower unionization rate.
Also, there is a reduction in the number of unions in the ndustrial sector. Some states have a right to work laws in place which has also led to reduction in the power of the unions.
Lastly, thecemployer reactions are also a contributory factor as they're more aggressive so as to keep unions from their companies.