President Trump allegedly mentioned expanding into Greenland in his first presidency in 2016-2020. I think this is the expansion that is most likely to go through. American troops are currently stationed in Greenland in order to ensure its security. Greenland has minimal inhabitants allowing it to easily remain a colony. This would prevent partisan politics wondering who Greenland would vote for and also prevent Puerto Rico from feeling left out as a new territory just gets accepted into statehood without gaining statehood itself. I do not foresee this coming to all out war as Greenland is currently owned by Denmark which, like the US, is part of NATO. However, if the inhabitants of Greenland decide they want to become part of the US, perhaps Denmark would have a hard time stopping them.

The Panama Canal was originally built by the United States after it backed the revolution that created the country of Panama. It was a very deadly project that cost many lives to construct due to the illnesses prevalent to the environment. Although the US has a strong claim to the project, the US merely wants use of the canal and likely would not want to deal with the struggle of keeping it maintained possibly risking more lives. This could easily be accomplished through threats and through blockades as the US can easily post ships at either end of the Panama Canal to prevent ships from access it.

The country of Canada has ended up in difficult economic straits under the rule of Prime Minister Trudeau. He is in the process of stepping down and his party is scrambling to find another candidate to endorse while Pierre Poilievre is primed to take his place from the Canadian Conservative party. President Donald Trump plans to make tough tariff policies upon Canada without care of whether the country goes bankrupt. Trump indicated that if the country goes bankrupt it can always become the 51st state of the United States. However, I think granting Canada statehood would be very difficult and likely require that each of Canada's 10 provinces be granted statehood instead of Canada being admitted to the Union as one state. This would be a very large undertaking and drastically change the political landscape in the US. I find this highly unlikely to occur and far more likely to just be a threat.