SEE GRAPH IN RIGHT SIDEBAR; THIS POST UPDATED 04/24/18
The values plotted in the sidebar graph are derived from Rasmussen Reports approval ratings for Obama and Trump. Trump’s 7-day average ratings remain just above the level of Obama’s ratings at the same stage of of his presidency.
Here’s another way of looking at it:
The next graph underscores a point that I make often; namely, that the fate of the Republic is in the hands of the squishy middle of the electorate, with the other 2/3 roughly split between the fascistic left and libertarian right: