Final answer:
Donald Trump proposed denying birthright citizenship to those born in the U.S. unless one parent is a citizen, permanent resident, or in the armed forces.
Step-by-step explanation:
Donald Trump has proposed an alternative to birthright citizenship as stated in the 14th Amendment. He suggested denying U.S. citizenship to anyone born in the U.S. unless at least one parent is a U.S. citizen, a permanent resident, or in the armed forces. This proposal aims to restrict birthright citizenship to those with stronger connections to the country, rather than solely based on place of birth.