Protesters hold up pocket Constitutions during Thursday's rally by Donald Trump's campaign at Merrill Auditorium.

Nyanen Deng of Portland holds a sign during a silent protest against Donald Trump at Monument Square Thursday. Deng said she came to the square on her lunch break and joined because she was happy to see people rally for love over fear.

Trump protesters confront Trump supporters outside the ahead of the candidate's appearance at Merrill Auditorium. From left: Sophia Pena, Sigourney Pena and Sonja DiRisi, all of Scarborough. Shawn Patrick Ouellette/Staff Photographer

Portland Mayor Ethan Strimling speaks with protestors outside the Trump rally in Portland on Thursday. Shawn Patrick Ouellette/Staff Photographer

Anthony Marvin of Portland protests outside Merrill Auditorium before Thursday's rally. "I cannot tolerate hate," Marvin said.

Donald Trump's appearance in Portland on Thursday drew a crowd of protesters.

Portland Mayor Ethan Strimling chants "love trumps hate" while addressing a crowd of protesters before the Trump rally at Merrill Auditorium.

Doug Emerson, left, a Trump protester, and Elihu Upham, a Trump supporter, shake hands after speaking briefly before the rally Thursday at Merrill Auditorium.

Protesters hold up anti-Donald Trump signs during a silent demonstration against the Republican presidential candidate at Monument Square Thursday.

Trump supporters walk past protesters on Congress Street after Trump's rally Thursday at nearby Merrill Auditorium.