Controversial Sheriff Joe Arpaio, who's leading the security at an Arizona Donald TrumpDonald John TrumpMueller report findings could be a 'good day' for Trump, Dem senator says Trump officials heading to China for trade talks next week Showdown looms over Mueller report MORE rally, said on CNN his officers arrested three in a roadblock protest Saturday. 
 
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Protestors in Fountain Hills, Arizona, shut down traffic heading to the Trump rally. Arpaio said that some cars were towed.
 
"We're not going to let any demonstrators intimidate this forum or this sheriff in my town," Arpaio said. "Right now, we're going to have a nice, nice rally with Donald Trump and my main mission is to keep him safe and also all the people that are attending all the people that live in Fountain Hills, Arizona ... Everything I hope will go smoothly."
 
Arpaio, a big Trump supporter, also introduced the presidential candidate at the rally Saturday.