Trump should name all of the democrat senators who voted against Sessions and say “Sessions didn’t fool these intelligent and dedicated democratic senators like he fooled me into nominating him and those who voted to confirm him as AG. Now I see what they saw so I’m going to correct my mistake and fire Mr. Sessions immediately. I’m sure all the senators who opposed him are grateful that I’ve finally seen him the way they always saw him.”
Rule #1, never admit defeat. That would backfire on Trump in a big way especially for the 2018 mid term optics.