Uh, Phil ... that would be corroborate.
You do Constitutionalists no favor by making such a basic blunder with the English language.
Come to think of it, you've done Constitutionalists no favor thus far.
I caught that too.
Sigh.
My univ students’ vocabularies are horridly inadequate and they don’t seem to think it’s anything worth bothering about.
Sheesh.