How successful were labor unions in the late 1800s?

What was the overall impact of eli whitneys introduction of interchangeable parts?

How did the construction of the erie canal improve transportation in the united states in the 1820s? a. the canal connected the great lakes to the mississippi river. b. the canal connected the great lakes to the ohio river. c. the canal connected the atlantic and pacific oceans. d. the canal connected the great lakes to the atlantic ocean.

How have a past president and our current president abused the powers granted to the president of the united states by the constitution and the people ?