If someone wanted to be a Supreme Court justice, then they should look to get a judgeship at some level. He did do two clerkships which would have been on the right path. But after that, nothing.
I can understand being in the Judiciary or Legislature (Senate or HoR) with a Constitutional Law background, but not the Executive Branch.
It is my understanding our current President has a Constitutional law background.
Yeap, our President also was a first term Senator, amongst other similarities between them. Since we already went down this path once with 0bama, I would rather not repeat it with Cruz.