Las Vegas: President Donald Trump arrived in Las Vegas on Wednesday to visit a city shaken by the deadliest shooting spree in modern US history, a trip that will test his ability to console a shocked nation.

The President and first lady Melania Trump visited with Clark County Sheriff Joseph Lombardo after landing then departed for the local hospital, where they met with doctors and victims.

Mr Trump's trip is the first time he has had to deal directly with the aftermath of a major mass shooting of the type that have killed hundreds of people in recent years in the US.

After meeting with some of the victims of the worst mass shooting in modern American history, President Donald Trump said Wednesday that the shooter was a "very demented person."