US President Donald Trump has called for the arming of teachers to prevent school shootings like that which left 17 people dead last week in Florida.

Trump said a staff member with a gun could end an attack "very quickly."

He floated the proposal as emotional survivors of the 14 February massacre implored him to make sure something similar does not occur again.

President Donald Trump said Monday he supports Mitt Romney's bid for the US Senate from Utah, endorsing a former rival and major figure within the Republican Party.

The endorsement marked the latest chapter in an at-times tumultuous relationship. Romney was among the top Republican critics of Trump's behavior during the 2016 campaign, and Trump fired back in return, mocking Romney for his loss in the 2012 presidential election.

A report published in the media on Friday revealed that .U.S. President Donald Trump and his allies concealed an affair with a former Playboy model through secret meetings, payoffs and legal arrangements.

Karen McDougal, a former Playboy Playmate of the Year, documented her alleged nine-month affair with Trump in an eight-page handwritten note shared with The New Yorker.

McDougal, 46, claims Trump once offered to pay her after they had sex in a private bungalow at the Beverly Hills Hotel, where many of their purported liaisons took place.

Survivors of a Florida school shooting that left 17 people dead have travelled to the state capital to press lawmakers to take more action on gun control.

About 100 students arrived in Tallahassee hours before the state legislature rejected a ban on assault rifles like the one used in the attack.

They are due to stage a rally at the statehouse later and meet legislators.

The United States is planning to boost domestic production of 35 critical minerals including uranium, cobalt and lithium, in pursuance of President Donald Trump’s America First policy.

The US said the 35 minerals are critical materials used in basic manufacturing, batteries and electronics.

A prominent critic of President Donald Trump and Former US Republican presidential candidate, Mitt Romney, today, announced that he will run for a Senate seat from Utah.

The declaration via a video announcement confirmed speculations.

“I have decided to run for United States Senate because I believe I can help bring Utah’s values and Utah’s lessons to Washington,” he says in the clip.