Again, an election poll, particularly a US presidential election poll is extremely complicated and far more prone to error than opinion polls, which taken in aggregate give you a pretty good view of people's opinion. That said, the preponderance of US election polls had Hillary up 2-3% nationally, which was the final result.
Rasmussen is actually one of the crudest and most inaccurate of opinion polls for a variety of reasons. They only use telephone AND they only take Approve or Disapprove; they throw out the undecideds. If you look at Rasumussen over the past month there has been a 12% point swing (in one month) showing Trump approval from 38% on the low to 50% on the high. Sorry, but that defies common sense.
Trump Approval Index History - Rasmussen Reportsâ„¢
Sorry, but that swing makes no sense.... especially since most polls have been far more consistent in showing Trump*s steady slide.
https://www.realclearpolitics.com/epolls/other/president_trump_job_approval-6179.html
The fact is that a super majority of American's do not approve of this president.
...and, while we are admonishing you for all your wrong impressions, let us also correct you that at this point in the Obama presidency, his approval rating was in the mid 50's. (you know, about as many people approved of Obama as now disapproves of Trump.)
Presidential Approval Ratings -- Barack Obama | Gallup Historical Data & Trends