(Portland, OR)  --  Four people are facing possible charges after competing protests turned rowdy downtown.  Police arrested the four yesterday amid dueling rallies organized by the alt-right group Patriot Prayer and the left-wing group Rose City Antifa.  Police said there were multiple fights and several weapons were taken from participants.  Police in riot gear were on the scene to keep the peace.  The rallies came nearly a year to the day after similar dueling protests turned violent, prompting police to arrest more than a dozen people on June 4th, 2017.