It would have reduced the number of foreign-born people entering the US
Explanation:
Who did Political machines gain some of their power from by performing favors for them? political machines offered services to voters and businesses in exchange for political or financial support. they gained control of local govt. in cities such as NYC, chicago, baltimore, and san francisco.
The answer is : The killing of four students at Kent State University.
Hyksos took over it and invaded it.