US President Donald Trump has said that funding for a border wall with Mexico must be attached to any immigration deal.
Mr Trump's administration released its wishlist for immigration reform late last night.
It includes scrapping the Diversity Visa Lottery, introducing a merit-based visa system and a crackdown on unaccompanied minors entering the US.
The US president said that funding for a wall along the US border with Mexico was core to any deal.
Mr Trump has previously pledged to protect young people who were brought to the US illegally as children - known as 'dreamers' - who until now had been permitted to stay in the US under the Deferred Action for Childhood Arrivals programme.
The new proposals call for politicians to pass a new bill to replace that scheme, but could see parents of the 'dreamers' liable for deportation.
There are plans to turn away unaccompanied minors and a push to speed up deportations with increased numbers of immigration enforcement officers and judges.
Also there is a requirement for employers to use a verification system to stop undocumented immigrants receiving jobs.
Mr Trump wants to end the Diversity Visa Lottery system which issues 50,000 visas each year. Irish nationals are among those qualified to apply for the lottery.
Mr Trump wants visas to be issued based on merit and skills and not automatically to extended family members.
He also wants a strict limit on the number of refugees admitted to the US.