This legislation is the most significant immigration enforcement and border security related bill to pass the Senate in nearly three decades.

The bill will be considered by the U.S. House of Representatives this week before heading to President Trump to be signed into law.

Deporting millions of migrants or enforcing the Laken Riley Act will largely depend on Congress' ability to allocate roughly $100 billion.

The bill includes provisions introduced by Senator Joni Ernst (R-IA) mandating the detention of individuals charged with crimes causing death or serious bodily harm. An amendment by Senator John Cornyn (R-TX) adds mandatory detention for those who assault law enforcement officers.

Under the bill, called the Laken Riley Act, state attorneys general like Ken Paxton would have the ability to challenge federal immigration officials.