What other factors might cause a mass migration similar to the irish immigration of the mid-1800s? list three possible reasons.

Things that could cause mass imigration could be things much like the irish with famine, but it could also be forced by the weather like the hurricanes happining right now, poor living conditions or even lack of government power if enough people revolt against their own government. hope this helps bro 

Upheld the 1st amendment according to the u.s constitution. freedom of speech being limited in this case yes national emergencies