Scotland's First Minister Nicola Sturgeon wants to "build a wall" between Scotland and England, Jacob Rees-Mogg has claimed.
The comment was linked to a row over whether the Scottish Government will back a covid-19 quarantine rule on people coming from the rest of the UK.
The First Minister has said her Government has no plans for such a policy, but said she cannot rule it out on public health grounds.
This led to Prime Minister Boris Johnson informing MPs that "there is no border between Scotland and England", a claim mocked by the SNP. Sturgeon responded by criticising Johnson.
The Commons Leader said it may not be a "bricks and mortar" structure in the vein of Hadrian's Wall or President Donald Trump's border wall with Mexico, but he claimed Sturgeon wants a "metaphorical wall".
During Business Questions, Rees-Mogg criticised what he described as Sturgeon's "shameful" remarks after SNP MP Tommy Sheppard said the UK Government is "led by someone who thinks the border does not exist".
Rees-Mogg replied: "He mentions borders, and I noticed that Nicola Sturgeon wishes to have a wall - perhaps she is modelling herself on other leading political figures - between England and Scotland.
"But, as my right honourable friend the Prime Minister said, there is no border between England and Scotland and it was shameful to call for a border of that type of kind to be erected to stop people travelling freely between constituent parts of the United Kingdom.
"One never thought that Nicola Sturgeon would model herself on American political figures and want to build a wall - at least a metaphorical wall if not actually getting like Hadrian with the bricks and mortar."
Sheppard said: "These comments were outrageous. I asked him a series of serious questions and he made snidey comments about my appearance and attacked the First Minister. It is shocking and disgraceful.
"He demonstrates all the arrogance and entitlement you would expect from a millionaire Tory."
