[dandesim]

Consumption - They are people who will buy things. They will also add labor to the market, making goods less expensive for others to purchase.

Government Spending - Investment in industries like energy, infrastructure, and chip manufacturing all needs labor. With a ~3% unemployment rate that's going to be hard to come by.

Investment - Immigrants will have money to save and invest. Many small businesses are owned by immigrant families.

Net exports - Lower skilled factory labor is in demand and hard to come by. Can't make stuff in America if there is no one to make it.