Assert what? Do you deny that Rubio supported the Rubio-Schumer Gang of 8 bill? Do you deny that Rubio has sponsored a bill to increase the number of H-1B visas? I am giving you facts. You just deal in generalities and invective.
No, what I am asking for is more information on these things, what proposals Rubio specifically favored, why that was so bad, what his current platform position is that he has articulated, how his ideas compare to or differ from the other candidates, etc. etc.
Also, immigration is one issue among many. So, for example, if Rubio is strong on pro-life and religious liberty, and another candidate is weak on those issues but stronger on immigration--or Rubio is very strong and knowledgeable on foreign policy, and another candidate just likes to blow off gas and say that things will be "great"--well, I weigh all these factors.