Claims that agreement is unconstitutional could pose problems in talks with Washington over Greenland

Denmark could face legal action over an agreement that gives the US sweeping powers on Danish soil, over claims it is “unconstitutional” and could pose problems in talks with Washington over Greenland.

The agreement, which was signed under the Biden administration in 2023 and was passed by the Danish parliament last year, gives the US “unhindered access” to its airbases and powers over its civilians.