U.S. And World Leaders React To Las Vegas Tragedy

Former Arizona Representative Gabrielle "Gabby" Giffords was among the prominent voices to send out her condolences after 58 people were killed and, reports now estimate, more than 515 others were injured in the deadliest mass shooting in modern American history when a lone gunman opened fire on country music festival attendees from the 32nd floor of the Mandalay Bay Resort and Casino.

Giffords has been at the forefront of the movement to curb gun violence since she survived an assassination attempt in January 2011. Giffords was shot in the head by Jared Lee Loughner during an event outside a Tuscon grocery store. Six others were killed and an additional 12 were injured during the attack.

Just days ago, Giffords expressed her support for Representative Steve Scalise (R-LA), the House Majority Whip, who returned to the House following months of rehabilitation after he survived a shooting in June during a congressional baseball practice that left several others, including Congressional aides, wounded. Scalise also sent out his condolences to victims of last night's attack.

Elected officials, both present and former, also weighed in.

President Donald Trump tweeted his condolences earlier this morning:

From former President Barack Obama:

And former VP Joe Biden as well:

From Senator Cory Booker (D-NJ):

Canadian Prime Minister Justin Trudeau tweeted his support as well.

Pope Francis also weighed in, referring to the killing as "a senseless tragedy."

“Deeply saddened to learn of the shooting in Las Vegas, Pope Francis sends the assurance of his spiritual closeness to all those affected by this senseless tragedy,” said a message sent to the Roman Catholic bishop of Las Vegas today.

The attack on the Las Vegas Strip now holds the morbid record for being the deadliest mass shooting on American soil since the mass shooting at Orlando’s Pulse nightclub last summer, which left 49 dead and 53 injured.