ORLANDO, FL — Florida's two U.S. Senators introduced a rare joint resolution Tuesday commemorating the victims of the Pulse Orlando nightclub tragedy as survivors remembered one of the most deadly mass shootings in the nation's history. Meanwhile, mourners gathered at an interim memorial at the site of the now shuttered venue.

Republican Marco Rubio and Democrat Bill Nelson introduced the measure to honor survivors and commemorate victims of the Pulse Orlando nightclub attack on June 12, 2016. See Patch's coverage from the Orlando memorial: Hundreds Pay Tribute To 49 Victims Of Pulse Nightclub Shooting.

"This is a day to look back on what we've actually done to prevent another such tragedy from ever happening again," Nelson said on the Senate floor. "Unfortunately, not much has happened until a bold, very courageous group of students after the massacre in Parkland, Florida, at Marjory Stoneman Douglas High School — until they stood up and said we're going to make a difference."

Nelson noted Monday's shooting of a police officer in Orlando and the murder of four "young innocent children" under 12.

"When are we going to say enough is enough," the senator asked. "At some point Congress has to accept the fact that the only way to change the current path is that we as a society are going to have to take a step in the right direction to do the right thing." Parkland survivor David Hogg called on voters to elect morally just leaders.

"This day two years ago, 49 people where murdered," Hogg said on social media. "A little less than two years later, 17 were shot and killed at my high school. As a result of our politicians refusing to take action. Now we must vote this November for those that no longer can to get morally just leaders elected."