PHOENIX (AP) — Protesters blocked a main highway leading into the Phoenix suburb Saturday where Republican presidential front-runner Donald Trump was preparing to hold a campaign rally alongside Arizona's revered Sheriff Joe Arpaio.The protesters parked their cars in the middle of the road Saturday, unfurling banners reading "Dump Trump" and "Must Stop Trump," and chanting "Trump is hate." Traffic was backed up for miles, with drivers honking in fury.The disruption occurred well after large crowds lined up to get into the Fountain Hills rally.