Donald Trump (and many of his aides & supporters) have claimed that his electoral college victory was a "landslide", and that gives him a mandate to enact his policies. To put it kindly, that is an unmitigated LIE!
The chart above (using information from fivethirtyeight.com) shows the percentage of the electoral college vote that every president received in their first elected term since 1900. That includes 19 presidents. Note that 15 of those 19 presidents received a larger percentage of electoral college votes than Trump received (and 14 of them received a significantly higher percentage). His percentage was larger than only three presidents (and then not by much).
That's not a landslide, unless you consider that every president elected in the 20th and 21st centuries got a landslide (which is a ludicrous notion). And since he didn't receive a landslide in electoral votes or in the popular vote (which he lost by over 2.8 million votes), there is NO mandate for him to do anything.