Why didn't stalin join forces with hitler during world war ii?

What could have been done to stop the illegal voting? what about the violence?

All of the following were weaknesses of the articles of confederation, except: a) the central government was not permitted to regulate state, interstate, or foreign trade. b) the central government was not permitted to borrow money. c) the central government had little ability to regulate money. d) the central government had no ability to tax.

What does it mean to say the united states has a federal system of government