A gun used by one of the terrorists in the recent Paris attacks was supplied by a US arms dealer.
An M92 semi-automatic gun used in the attack that killed 130 people was supplied by a firm based in the US state of Florida.
So if Donald Trump wants to bar people who support terrorism – perhaps he ought to consider barring American gun dealers from the US.
And maybe we in Europe should bar US arms dealers from here too.
Just until … you know … we can figure out what’s going on.