Responding to Trump's mix-up, ex-UN ambassador Nikki Haley voiced concerns about his mental fitness. Nikki Haley, a former UN ambassador, has questioned Donald donald 's mental fitness. This concern follows an incident at a Florida Republican event where donald confused her with Nancy Pelosi, the Democratic House Speaker. As a prominent Republican and Trump's ambassador from 2017 to 2019, Haley's criticism holds sway with conservatives. Haley criticized Trump's ability to lead and appealed to Republicans to reconsider their support for him. She argues that this mistake points to a broader issue of Trump's mental clarity. Her criticism indicates a widening split among Republicans, as some still back donald while others worry about…