Donald Trump’s campaign is considering offering the role of vice president to his most long-standing campaign rival, Axios reported Saturday. Nikki Haley is under “active consideration” for the position, according to unnamed insiders in the former president’s camp. Axios said Trump’s decision hinges on whether Trump believes Haley — whom he called “Birdbrain” throughout the fight to become the GOP’s presidential nominee — can help him avoid a prison sentence and cover millions of dollars in debt racked up by legal bills if he loses the election. Haley, however, has publicly stated she won’t en…