Why does truman believe the taft-hartley act would threaten democratic freedoms?

Absolute Correct
Truman states that the act might infringe on freedom of speech as well as freedom of the press.

Because it might violate the freedoms of speech and the press.

Ifound this on google “the existence of agglomeration economies is central to the explanation of how cities increase in size and population, which places the phenomenon on a larger scale. the concentration of economic activity in cities is one reason for their development and growth.” i hope this you for what your looking for.