>> Congress should pass law that they must show who is calling  <<

Um ...
There is a law ...
but, do you think criminals obey laws?

The FTC and top communications companies are meeting, to determine what they can do to stop robocalls and other illegal calls.  Here is a link to a frequently updated page, showing the history and progress of their initiatives:

http://www.phonehelp.2truth.com/initiatives.html

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