As a result, the current administration can't force them not to use those licenses, but are still likely to put at least _some_ pressure on them to minimize their use of them.
If a majority government came to power and had this as a major part of their platform I suspect they'd try to get legislation passed, but any other government is not going to expend as much effort on it as would be needed to get it through.
Could the US government cancel outstanding bonds? Sure. Would it harm sales of future bonds? Yep.
It's much better and easier to just buy them back if the will is there.
https://markets.businessinsider.com/news/commodities/europe-...
https://www.nytimes.com/interactive/2022/09/07/world/europe/...
Most of the deaths attributed to the cold will be noticeable only in a slight uptick of elderly people living alone dying at a higher rate than usual, followed by a dip in their death rate in the subsequent months. The years of potential lost life (YPLL) will be minimal.