President-elect Joe Biden plans to unveil a sweeping immigration bill on Day One of his administration, hoping to provide an eight-year path to citizenship for an estimated 11 million people living in the U.S. without legal status, a massive reversal from the Trump administration’s harsh immigration policies.

The legislation puts Biden on track to deliver on a major campaign promise important to Latino voters and other immigrant communities after four years of President Donald Trump’s restrictive policies and mass deportations. It provides one of the fastest pathways to citizenship for those living without legal status of any measure in recent years, but it fails to include the traditional trade-off of enhanced border security favored by many Republicans, making passage in a narrowly divided Congress in doubt.

Expected to run hundreds of pages, the bill is set to be introduced after Biden takes the oath of office Wednesday, according to a person familiar with the legislation and granted anonymity to discuss it.