Thank you for a very interesting quote.
I have never been a great admirer of Lincoln. Although I certainly respect his personal passion to end slavery, I think he inflicted horrifying damage on the Constitution and the country in his effort to make that happen.
I'm not sure I have read anything by Mencken, but I know some people describe him as a Conservative.
I read through Mencken's bio on Wiki and found another quote you might enjoy:
Democracy, as defined by Mencken, is “the worship of jackals by jackasses.”
“the worship of jackals by jackasses.”
That’s good. I wonder if he was comparing democracy to a representative republic.