US President Donald Trump speaks during a "Keep America Great" campaign rally at Huntington Center in Toledo, Ohio, on January 9, 2020.

The White House is considering expanding its much-litigated travel ban to additional countries amid a renewed election-year focus on immigration issues by President Donald Trump, according to four people familiar with the deliberations.

A document outlining the plans has been circulating the White House, but the countries that would be affected are blacked out, according to two of the people, who spoke on condition of anonymity because the measure has yet to be finalized.

The expanded ban could cover several countries that were included when Trump announced the first iteration of the ban by executive order in January 2017 but were later removed amid rounds of litigation. Iraq, Sudan and Chad, for instance, had originally been affected by the order; the Supreme Court upheld a watered-down version of it by a 5-4 vote.

The most recent iteration of the ban includes restrictions on five majority-Muslim nations: Iran, Libya, Somalia, Syria and Yemen, as well as Venezuela and North Korea.

The White House did not immediately respond to questions about the effort, which appeared timed for release in conjunction with the third anniversary of Trump's first travel ban, which was announced on Jan. 27, 2017.

That ban sparked an uproar, with massive protests across the nation against what many derided as a "Muslim ban" and chaos at airports, where passengers were detained.