Sowell's solution to the presidential election dilemma is for the office to be left vacant for four years, Birdie.
Having said that he discusses the damage either president might afflict (9m into the clip) and concludes that Trump's would be temporary and could be unravelled quickly, but Hillary's could be permanent. In Sowell's words if she gets a majority of "activist judges" in the Supreme Court it could mean the end of constitutional government in the US.
Earlier parts of the interview - Sowell discusses free trade (the obviously wrong Trump policy, but the one which will give him the most disaffected Democrat votes) and "systemic racism", the most immoral attitude of Obama and Clinton, apart, possibly, that of enabling the mullahs to acquire nukes.
But, hey, Birdie? We've got cross-gender locker rooms to worry about!