Although former South Carolina Governor Nikki Haley failed to surpass Donald Trump in the Republican primary, the ex-UN Ambassador did manage to expose where the former president is “potentially weakest” ahead of the November election, according to a Politico analysis by Lisa Kashinsky and Jessica Piper. “The base is not secure for Donald Trump,” GOP strategist and co-founder of the anti-Trump Lincoln Project Mike Madrid told Politico. He insisted that President Joe Biden “is in a much stronger position appealing to Republican base voters than he was four years ago.” Kashinsky and Piper note t…