What was one reason for the expansion of machine politics in the nineteenth century?

The arrival of immigrants in huge numbers made it difficult for local governments to provide basic services.
Urban political machines, constructed to a great extent on the votes of various migrant populaces, apportioned employments and arranged welfare benefits while offering roads of social portability when nearby governments gave a lack of such administrations.

They had strained relationships with colonists but good relationships with american indians

Internal combustion engines