Demonstrators raise their fists in protest of President Trump's attempts to end the Deferred Action for Childhood Arrivals (DACA), an executive action made by President Obama that protected minors known as Dreamers who entered the country illegally from deportation, outside of the U.S. Capitol in Washington, March 5, 2018. Samuel Corum | Anadolu Agency | Getty Images

More than 100 major companies including Apple and Amazon are renewing their push for immigration reform as another potential government shutdown looms. In a letter to lawmakers, the coalition of companies urged Congress to pass bipartisan legislation that enables more than 700,000 immigrants, known as "Dreamers," to legally work and live in the U.S. The letter ran Monday as a full-page ad in The New York Times. CEOs who signed the letter include Apple's Tim Cook, Facebook's Mark Zuckerberg, Amazon's Jeff Bezos, Google's Sundar Pichai, and Twitter and Square's Jack Dorsey.

"With the re-opening of the federal government and the presumptive restart of immigration and border security negotiations, now is the time for Congress to pass a law to provide Dreamers the certainty they need. These are our friends, neighbors, and coworkers, and they should not have to wait for court cases to be decided to determine their fate when Congress can act now," they wrote in the letter. Immigration is one of the biggest sticking points between the parties as the government lurches toward another potential shutdown at the end of this Friday. President Donald Trump has been a big opponent of the Obama-era Deferred Action for Childhood Arrivals program, or DACA, which allows young immigrants who arrived in the U.S. illegally as children to stay and work in the country. Trump had proposed limited legal protections for "Dreamers" in exchange for money to build his proposed border wall, but Democrats quickly rejected the temporary solution as "inadequate." Losing DACA workers would cost the economy $350 billion in GDP and $90 billion in tax revenue, the companies said in the letter.