GDP = C + G + I + NX

  C = Consumption
  G = Government spending
  I = Investment
  NX = Net exports

Which of these exactly is immigration going to boost and how will it sum to $7 trillion? My money is overwhelmingly on G for mass low skill immigration. It’s easy to see how it will increase strain on the public purse.

Needless to say GDP is not necessarily the right metric to optimize for. It’s kind of like BMI in that way. Useful when used properly, not so much when other factors are ignored.

Edit: I’m not interested in rhetoric. I want to see how the numbers add up. Government spending is the likely candidate.