Senator Sessions helped Ted craft his immigration policy and they just worked together on an American Workers First Act. Cruz has said Sessions would definitely be involved in his administration. I think he might select him as VP.
I can't envision Cruz choosing Sessions. Do you have insider information? Cruz would have a tough time of it, winning enough states. My concern is that Cruz might choose someone northern or Midwestern (Christie, Kasich, Walker etc) in a feeble attempt to get some of those states. Cruz does seem to be very big on brilliant strategies (that don't often work, so it seems ie: TAP)
Trump? He already has a shot at New England, NY, NJ, PA, OH etc