Republican U.S. presidential candidate businessman Donald Trump. © Mike Blake

Republican presidential hopeful Donald Trump and Scottish MP Alex Salmond have traded blows in the wake of a failed legal challenge by the US tycoon to block an offshore wind farm.

Salmond branded Trump a loser after the outspoken presidential hopeful lost a legal challenge against an offshore wind farm near his Aberdeenshire golf course.

In a statement released on Wednesday, Salmond complained the proceedings had “dragged out for years” through three court judgements as Trump attempted to stop the wind farm.