Following a debate performance from President Joe Biden that failed to solidify his ability to defeat ex-President Donald Trump in November, several newspapers and Democratic leaders have called on the president to end his re-election bid — but one conservative is shutting those calls down. Anti-Trump Lincoln Project adviser and former Republican consultant Stuart Stevens, in a Sunday op-ed published by the New York Times, argues, “For all the talk of Mr. Biden’s off night, what is lost is that Mr. Trump missed a great opportunity to reset his candidacy and greatly strengthen his position.” St…