President Obama on Orlando Shooting: 'Heartbreaking Day' for LGBTs

President Barack Obama addressed the nation Sunday afternoon after more than 100 people were gunned down at a gay nightclub in Orlando.

The president confirmed that the attack was the largest mass shooting in U.S. history.

"This was an act of terror and an act of hate," he said. "We are united in grief, outrage, and resolve to defend our people."

At least 50 people died and 53 more were injured after Omar Mateen opened fire at gay nightclub Pulse. Orlando police shot and killed Mateen.

Obama expressed his sadness at the attack and his solidarity with the LGBT community.

"This is a heartbreaking day for our friends, our fellow Americans who are lesbian, gay, bisexual, and transgender," he said. "This man targeted a nightclub where people came together to dance and to sing and to live. This is a place of solidarity and empowerment."

The president emphasized the continued unity of Americans in the face of tragedy.

"This is a sobering reminder that an attack on any American, regardless of race, ethnicity, religion, or sexual orientation, is an attack on all of us," he said.