Whether you're a birthright citizen or were naturalized, you can petition to bring your foreign-born fiancé(e) to the United States for the wedding. They can use a K-1 visa, as long as you intend to marry within 90 days of their entry. Once you are married, your spouse can apply for lawful permanent residence (green card status) and, eventually, citizenship.
If you are a U.S. citizen or lawful permanent resident (green card holder), your spouse may be eligible to join you in the U.S. and become a lawful permanent resident right away. This applies to both new and longer-term spouses from abroad.
Dozens of U.S. business leaders, including CEOs at top American companies, recently signed a joint letter to Homeland Security Secretary Kirstjen Nielsen. They expressed "serious concern" over several Trump administration immigration policies, focusing on those surrounding H-1B visas. The signatories of the joint letter included the heads of Apple, IBM, Salesforce, BlackRock, PepsiCo, JPMorgan Chase and others.