News Analysis: Trump fervor could fade, but that could take a while

"This could last for several months more," Julian Zelizer, professor of history and public affairs at Princeton University, told Xinhua.

Indeed, if Trump sticks around too long, that could damage the GOP brand at a time when the party is trying to re-vamp its image to appeal to women and minorities, as the party is viewed as one of older white men at a time when the country is becoming much more multi-cultural and single women are a sought-after voting block for candidates.

"He brings out the most controversial images that...can harm the party nationally," Zelizer said.