Stokes has made a study of how Trump has changed the American people’s attitudes to the world. After looking at decades of Pew polling, his main conclusions are threefold: that Trump has shattered any broad American consensus about the US role in the world, that he’s reshaped Republican voters’ opinion in his own image, and that these changes aren’t going to go away when Trump does.

How can he be so certain that the changes aren't going to be reversed? To me it looks that Trump has proven that the majority of Republican voters have no ideology other than what their president and/or Fox News tells them, so as soon as Fox News changes their tune, so should the voters, right?