President Obama Says Colorado Shooting Reminds Us 'Our Time Here Is Limited and it Is Precious

President Obama addressed the tragic Aurora, Colo. shooting during a speech at what was originally supposed to be a campaign rally in Fort Meyers, Fla. The president left out any and all traces of his reelection campaign in an attempt to comfort a grieving nation, saying the incident reminds us “our time here is limited and it is precious.”

Obama said his administration would do everyone in his power to "ensure the safety of all our people" and pledged his support for the people of Colorado.

"While we will never know fully what causes someone to take the life of another, we do know what makes life worth living. The people we lost in Aurora loved, and they were loved. They were mothers and father, they were husbands and wives, sisters and brothers, sons and daughters, friends and neighbors. They had hopes for the future. They had dreams that were not yet fulfilled," Obama said.

He continued: "I'm sure that many of you who are parents here have the same reaction that I did when I heard this news. My daughters go to the movies. What if Malia and Sasha had been at the theater, as so many of our kids do every day? Michelle and I will be fortunate enough to hug our girls a little tighter tonight and I'm sure you will do the same with your children."

The president also included a moment of silence at the end of his address in honor of those who were killed in the shooting.

Watch Obama's remarks on the Colorado theater shooting via PBS here:

Obama has dropped plans to attend an additional re-election rally at Rollins College in Winter Park, near Orlando.

Republican presidential candidate Mitt Romney said in a statement that he and his wife, Ann, were "deeply saddened by the news of the senseless violence" that led to the loss of life and injuries. He said they were praying for the families and loved ones of the victims "during this time of deep shock and immense grief. We expect that the person responsible for this terrible crime will be quickly brought to justice."

A gunman opened fire early Friday at a theater on the opening night of the latest Batman movie, "The Dark Knight Rises." Authorities say 12 people were killed and at least 50 others were injured. Police originally said 14 people died in the attack but later revised the death toll.

The FBI said there was no indication that the shooting had any connection to terrorism.

Obama was in Florida at the time of the shooting. The White House says Obama was informed of the shooting by his Homeland Security Adviser, John Brennan, at 5:26 a.m. EDT. The White House released this statement shortly after:

“Michelle and I are shocked and saddened by the horrific and tragic shooting in Colorado. Federal and local law enforcement are still responding, and my Administration will do everything that we can to support the people of Aurora in this extraordinarily difficult time," he said in an earlier statement.

Check back for updates -- video will be added soon.

The Associated Press contributed to this report.