There are no libertarians or far left politicians in the Oval Office, now or in the near future.
I cannot speak to how the US would behave in 50 years, but being true to its word it is mandatory for the US to project itself as the "world leader". The day the Oval Office is able to ignore its allies, it is the day the US is no longer a global leader.
That's simply the cost to pay to be seen as the leader of the free world. The fact that some US politicians openly want to go down the route of reneging its allies speaks volumes about how long the US empire will last.
I cannot speak to how the US would behave in 50 years, but being true to its word it is mandatory for the US to project itself as the "world leader". The day the Oval Office is able to ignore its allies, it is the day the US is no longer a global leader.
That's simply the cost to pay to be seen as the leader of the free world. The fact that some US politicians openly want to go down the route of reneging its allies speaks volumes about how long the US empire will last.