“Basically, the Republican leadership hates Trump,” Robert Shapiro, professor of political science at Columbia University, told AFP.

“They would like his supporters, but his supporters are attached to Trump,” he warned, predicting that the phenomenon Trump calls his “movement” will continue after Election Day.

“His supporters are still going to be there, and they are going to have their positions on trade and immigration and all these other issues,” Shapiro said.

“And what will also remain is the hate for the Democrats and Hillary Clinton and also the mainstream Republican Party.”

But it is not just the foregrounding of a different set of issues that will endure. Trump’s in-your-face style and aggressive rhetoric will leave a mark on future campaign strategies.

“He has changed political campaigning,” Jeanne Zaino, a professor at Iona College, told AFP.