Jimmy Carter helped prop the borders wide open.
https://hias.org/statements/hias-pays-tribute-former-president-jimmy-carter/
“During a global refugee crisis, and with bipartisan support, President Carter signed and implemented the Refugee Act of 1980, establishing a permanent system of asylum and refugee resettlement.”
https://hias.org/statements/hias-pays-tribute-former-president-jimmy-carter/