Donald Trump toured a gun factory in New Hampshire last May as he prepared to launch his presidential campaign.

The manufacturer, Sig Sauer, maker of the semi-automatic rifle believed to have been used in the Orlando shooting rampage.

Nor was it the only time that the fifth largest supplier of firearms in America featured in the tycoon's run for the White House.

In February, his sons Donald Trump Jr. and Eric also visited the factory, posing for a photo with MCX rifles - the type of gun reportedly used by Omar Mateen as he killed at least 49 people early Sunday in the Pulse nightclub.

And earlier this year, they posed for photos with Sig Sauer representatives at the National Shooting Sports Foundation's annual trade show in Las Vegas, where Mr Trump was making a speech.