Former UN Ambassador Nikki Haley on Monday said she would back her onetime boss, former President Donald Trump, if he decides to run for the Republican Party’s presidential nomination again in 2024 and not mount a bid against him.Former UN Ambassador Nikki Haley on Monday said she would back her onetime boss, former President Donald Trump, if he decides to run for the Republican Party’s presidential nomination again in 2024 and not mount a bid against him.