Your premise is false. We are not bringing in “dreamers”. They are criminally invading our country and trying to take it over for their own gain, while displacing actual Americans.
American families might be larger if they didn’t have to pay for all the “dead wood’ like so-called “dreamers’.
Many Americans simply have fewer children because they can’t afford more because they are paying for “dreamers” to replace their own children, without their consent.
Just thought I'd add a bit to your statement!