Thom Tillis, Lisa Murkowski, Mike Pence and others say action could hurt US economy and strain Nato alliance

Donald Trump’s escalating calls for the United States to seize or otherwise obtain Greenland has ignited fresh criticism from the president’s own Republican party, with some saying it could hurt the US economically or strain the Nato military alliance.

Such Republicans included US senators Thom Tillis and Lisa Murkowski, who were part of a bipartisan group to travel to Denmark to discuss concerns in Greenland, an autonomous Danish territory.

Both Tillis and Murkowski sharply criticized new tariffs threatened on Saturday by Trump on a slew of European countries – including Denmark, Germany, France and the UK – until the US is allowed to purchase Greenland.

Murkowski wrote on X that the tariffs were “unnecessary, punitive, and a profound mistake”, coming after Nato allies deployed troops in Greenland on Thursday in response to Trump’s threats to forcefully take the Arctic island if needed.