You'd think someone who wants America for Americans would want to encourage anything which promotes Americans having more children instead of importing them, but you would be wrong.
Rubio's insistence on a larger child tax credit stops some of the damage being done by Republicans to people with families larger than four.
Abolishing the personal exemption meant parents lost those exemptions for all their children, and the increased standard deduction didn't go far enough to replace them, meaning they'd pay more in taxes just because they have more kids.
Coulter's indignation appears to be purely personal, an ugly intrusion of the irrational into her otherwise often rational positions.
She doesn't realize how libertarian she sounds (she hates them by the way). Americans who have children are making it possible that something like America survives into the future, which is a more sure and lasting contribution than any law which might be passed.
Some of the founders recognized that laws are a mere parchment barrier. When the pirates are attacking, you need a navy, which means sailors, not a bill of rights.