President Donald Trump’s promise to deport “millions and millions” of immigrants will hinge on securing money for detention centers.

An immigration group sued on Wednesday to block President Donald Trump's move to expand fast-track deportations under his pledge to remove millions of people who are in the country illegally. People facing fast-track deportations do not have access to an attorney and are unable to present evidence against their removal from the U.

An estimated 11.7 million people are living in the U.S. illegally, and ICE currently has the budget to detain only about 41,000.