Trump also praised the work of police officers and emergency room doctors, whom he has previously credited for "miracle" work of preventing even more deaths. "We will struggle through it together".
The Trumps then traveled to University Medical Center to meet with patients and medical personnel.
Trump said authorities are "learning a lot more" about the gunman in the shooting, which killed 59 people and injured more than 500 during an outdoor Las Vegas concert.
The Las Vegas Sun reports that Trump met with victims privately, saying afterwards that he met "some of the most unbelievable people". The massacre, which left 58 people dead and more than 500 wounded, is the worst mass shooting in modern USA history. Lombardo said he was found with "in excess of 10 rifles" in the room and the police believe he killed himself. "That'll be announced at the appropriate time", he said.
"Our unity can not be shattered by evil, our bonds can not be broken by violence, and though we feel such great anger at the senseless murder of our fellow citizens, it is our love that defines us today - and always will, forever", President said.
Unbeaten Wilder to defend title vs Stiverne
The Haitian-born heavyweight known as, B.WARE, remains the only fighter out of 38, not to be knocked out by Wilder. He has talked up a clash with IBF and WBA champ Anthony Joshua but knows that first, he must overcome Stiverne.
"I have to tell you, it makes you very proud to be an American when you see the job that they've done", Trump said.
The gunman, who had no serious criminal background, purchased numerous weapons legally, though investigators were attempting to determine whether he illegally converted some to operate as fully automatic weapons, officials say.
Republicans who control the US Congress have shown little inclination to respond to Democratic calls for extra gun measures.
That stance represented a shift in the president's view. "And people who would not be around today are up there and they'll be leaving the hospital in a week or two weeks or five weeks". In 2013, he said background checks should be introduced "to weed out the sickos".
The newest debate over gun laws is starting out narrowly.
Whether he was a fan of Trump's or not before Wednesday, Gunderson certainly is now.