US Republican candidate Donald Trump insists Mexico will pay for a border wall, in a key speech reaffirming his tough stance on immigration.

US Republican candidate Donald Trump insists Mexico will pay for a border wall, in a key speech reaffirming his tough stance on immigration.

US Republican candidate Donald Trump insists Mexico will pay for a border wall, in a key speech reaffirming his tough stance on immigration.

US Republican candidate Donald Trump insists Mexico will pay for a border wall, in a key speech reaffirming his tough stance on immigration.

US Republican candidate Donald Trump insists Mexico will pay for a border wall, in a key speech reaffirming his tough stance on immigration.

US Republican candidate Donald Trump insists Mexico will pay for a border wall, in a key speech reaffirming his tough stance on immigration.

US Republican candidate Donald Trump insists Mexico will pay for a border wall, in a key speech reaffirming his tough stance on immigration.

US Republican candidate Donald Trump insists Mexico will pay for a border wall, in a key speech reaffirming his tough stance on immigration.

US Republican candidate Donald Trump insists Mexico will pay for a border wall, in a key speech reaffirming his tough stance on immigration.

US Republican candidate Donald Trump insists Mexico will pay for a border wall, in a key speech reaffirming his tough stance on immigration.

US Republican candidate Donald Trump insists Mexico will pay for a border wall “100%”, in a major immigration speech.

US Republican candidate Donald Trump insists Mexico will pay for a border wall “100%”, in a major immigration speech.