Like him or not, he has changed the narrative. Zero Politicians were discussing stopping illegal immigration until he came onto the scene. Everyone was pandering to Hispanics/Latinos and spouting act of love amnesty for countless millions of illegal aliens.
Sure, he's arrogant and a pompous but, he's obviously touching a nerve and garnering support from people that are disgusted with the establishment Republicans.
Like him or not, he's leading in the polls.
http://www.realclearpolitics.com/ep..._republican_presidential_nomination-3823.html