Nikki Haley's withdrawal from the presidential race has nearly cemented Donald Trump's position as the Republican nominee.

The focus has shifted to a fierce competition between Joe Biden and Donald Trump for Haley's approximate 570,000 supporters.

While Trump criticized Haley during her campaign, experts predict most of her base will side with Trump or not vote, in line with past trends.

Anti-Trump factions, including the Lincoln Project, are investing heavily ($50 million) to sway Haley's base towards Biden, especially in key states.

Despite Haley's campaign suspension and Mitch McConnell's endorsement of Trump, the contest for Haley's electorate remains intense.