Rubio might make a fine cabinet official in a Cruz or Walker administration.
I wouldn’t trust him for anything, not even dogcatcher.
I don't think Cruz wants anything to do with him.
Besides, there is no existing Cabinet-level position for Secretary of Stupidity or Secretary of Sycophancy.
His dream job would be as Secretary of Keeping Illegals Pouring Through the Fence, but I don't think a Cruz administration would allow that.
Walker, perhaps...but Walker ain't got a chance, so...