Like many, I am not sure where Cruz would be most effective... ranging from staying in the Senate to become Leader... a VP (traditionally not the most effective place for a guy like Cruz, but who knows in a Trump admin?)... Attorney General (prior to a SC appointment)....
If Cruz truly means what he says he needs to stay in the Senate and fix the mess that exists there. Unveil the corruption, stop the endless pork, ammendments to ammendments to bills, bills 100’s pages long that nobody reads.