The orders deny visas to those entering the country to give birth, and Trump promised "very big crackdowns" on organized birth tourism operations.
https://www.foxnews.com/politics/trump-signs-executive-orders-targeting-birthright-citizenship-birth-tourism-after-supreme-court-setback
https://www.foxnews.com/politics/trump-signs-executive-orders-targeting-birthright-citizenship-birth-tourism-after-supreme-court-setback