There is no evidence that Ted Cruz is a dominionist, unless you define “dominionist” down to mean a belief that Christians should have a positive influence on their culture, art, music, politics, science, etc. If that’s the meaning most Christians on earth are “dominionists.”
If by “dominionist” you mean something more specific, state your definition and provide the smoking gun that proves it true. I won’t be holding my breath.
Peace,
SR