Wow...you are uninformed. There has been more than one article about how cheap Trump is with his campaign. He believes people will come out and vote for him based on his strong personality. That is why he has spent so little on his ground game. That did not work for him in Iowa, but should be OK for him in NH. Trump has spent about 460,000 in advertising in NH and Rubio has spent 10 times that much.
Trump himself has said numerous times that he does not understand why other candidates spend money on polls since others do polls and you can find out for free. Trump thinks it is a smart practice to spend zero on polls and he may be correct - don't think that would work for most candidates, but he may be an exception.
So I repeat myself, Trump has no internals, because he does not spend one cent on polls. My advice is for you to know better your chosen candidate.
In the three months leading up to the Iowa caucus, many Republicans spent little to nothing on polling. Marco Rubio and Jeb Bush each spent just over $150,000 on campaign polls, while the two non-politicians in the race, Ben Carson and Donald Trump, declined to buy any polling research at all. The data is from the campaigns' spending summaries for the final quarter of 2015, which are released under federal election law.
Thus saith NBC News.