Murkowski is one of two Republicans in the US delegation in Copenhagen to protest Trump's remarks about Greenland.
She is also one of the few Republicans to openly criticize Trump's actions on Greenland. As a senator for Alaska, she feels she has been quite alone in her focus on the Arctic - until recently.
Has submitted a bill
When she returns to the US, her goal is to increase interest in the situation among her party colleagues. She believes that conversation and understanding are the key to increased support.
"Many Republicans have already spoken out against taking over Greenland and said that it is unacceptable. I would say that this movement has spread very quickly by being central to the conversations we are having," she says.
But she still views Trump's rhetoric regarding Greenland with great concern.
Together with Jeanne Shaheen, a Democratic senator who is also in Copenhagen, she has already introduced a bill that would prevent the use of American funds to occupy or annex another NATO country.
More Republicans needed
Congress can vote to limit the president's powers in war, but according to Politico, previous attempts to stop Trump have failed.
Murkowski avoids answering the question of how likely it is that the proposal will be implemented.
"My wish is that we don't need any action, because that actually underlines the obvious: in the event of a possible attack on a NATO country, the US will be there for its allies," she says.
Jan Hallenberg, associate senior researcher at the Swedish Institute for International Affairs, thinks it will be exciting to follow the bill.
"They've tried to word it to be as binding as possible, but it probably requires more Republicans to join and for John Thune (Republican Majority Leader) to put it forward quickly. If he wants, he can delay the process," Hallenberg says.
