This year, the heat has been turned up even more, after Donald Trump characterised the tiny Balkan nation's people as "very aggressive" and capable of sparking a third world war.
Few countries as small as Montenegro - the state has an army of around 2,000 with 400 reservists - has annoyed Moscow as much.
"Let's say Montenegro, which joined past year. why should my son go to Montenegro to defend it from attack", Fox News host Tucker Carlson asked Trump.
"It's hard to say because, when we look at actually what happened substantively coming out of that meeting, it is not clear that President Trump gave anything up", Continetti said.
TRUMP: No, by the way, they have very strong people - they have very aggressive people. They're very aggressive people.
Asked about Mr Trump's comment on Montenegro, Minister Payne said that after last week's North Atlantic Treaty Organisation meeting the "outcomes are to work closer and harder together and strengthen the security of Europe and the worldwide community".
"Montenegro is proud of its history and tradition and peaceful politics that led to the position of a stabilizing state in the region", the Montenegrin government said in a statement on Thursday, adding that the country "contributes to peace and stability not only on the European continent but worldwide, along with USA soldiers in Afghanistan".
The statement also stressed that while building friendly relations with other countries, Montenegro was ready "to boldly and defensively protect and defend our own national interests".
The only time Article 5 was ever invoked was by America after the September 11, 2001 terror attacks conducted by al-Qaeda.
This Western drift has been steered by Montenegro's President Milo Djukanovic, who has led the country nearly without interruption since 1991.
Darko Mandic, a 33-year-old toy seller, told AFP: "When I read Trump's statement about us, I thought I was still dreaming". Within a day he had been forced to admit, for the first time, that there had indeed been Russian meddling in the U.S. election process in 2016.
Carlson pressed Trump on the goal of the alliance, which was created in 1949 to protect the United States, Canada and a host of Western European nations from Soviet incursion. But NATO, first formed to counter potential Soviet aggression in Europe, is seen by many as a check on Russian ambitions in Eastern Europe under a leader who has demonstrated a willingness to annex territory through military might.
Mr Hunt said: "Nato has been the foundation of peace in Europe since 1945, but any alliance needs to be based on fairness in terms of the contributions of the members of that alliance".
Trump's skepticism towards Article 5 aligns with his distrust of multinational organizations in general, from the United Nations to the World Trade Organization.
Montenegro, the statement says, was the only Balkan country, which during the breakup of Yugoslavia the war broke out. "We have discussed this at length. there must be more burden-sharing when it comes to defending global rules-based order, when it comes to enforcing the rules and norms, and when it comes to promoting and advocating peace and stability around the world".