First of all, Netanyahu believes that he is the only real barrier to an Israeli withdrawal to the 1967 borders (totally false) and to the return of the political Left to power (circumstantially correct).
He referred to the two successful attempts of the Labor Party in the past 25 years (by Yitzhak Rabin in 1992 and by Ehud Barak in 1999) to replace the Likud as having been based on false accusations of corruption in Likud,