The British Parliament engaged in a sharp debate Monday over a proposal to ban Donald Trump from the U.K., as the combative U.S. presidential candidate counter-punched by threatening to walk away from a lucrative deal in Scotland. 

Sarah Malone, executive vice president for Trump International Golf Links, Scotland, said Monday that the real estate magnate, if barred, would abandon plans for an additional $1.1 billion investment in Scotlands golf-and-leisure industry.

It is absurd that valuable parliamentary time is being wasted debating a matter raised as part of the American presidential election, Malone said. 

U.K. lawmakers took up the lively debate after receiving a petition calling for the British ban on Trump. The petition, started by activist Suzanne Kelly, garnered nearly 600,000 signatures, far more than the 100,000 needed under British law to force Parliament to debate it.