Allies of former President Donald J. Trump formed a new super PAC days after Corey Lewandowski, Mr. Trump’s former campaign manager and the leader of one of the largest pro-Trump super PACs, was accused of sexual misconduct.

The move, an attempt to isolate Mr. Lewandowski and deny him a role in Mr. Trump’s political operation, creates a new outside group to support the former president as he considers whether to run again in 2024. It also hints at the internal tumult that continues to divide the wide circle of formal and informal Trump advisers…

But Mr. Lewandowski has told associates he has not been removed. He is one of the entity’s two board members. The new super PAC formed as a result, calling itself “Make America Great Again, Again!” — a repurposing of Mr. Trump’s 2016 campaign slogan.