1. Deport enemy aliens--anyone who is not a U.S. Citizen who is a citizen of a terror-supporting state. Do in now.
2. Deploy armed National Guardsmen to seal the border--as many and as long as it takes.
3. Begin a worldwide program of covert assassination against terrorist leaders and operatives. Contract it out to the Mossad if we can't build an organization capable of it.
4. Stop issuing visas--of any kind--for any reason-- to people from Syria, Libya, Iraq, Iran, Yemen, Pakistan, Saudi Arabia, Egypt, and the whole pack of terrorist nations.
6. Begin detailed background checks--designed to discover moles and sleepers--of all "naturalized citizens" from terror-supporting states.
7. Round up and deport all illegal aliens, no matter where they come from.
That would be a start.
--Boris