There are a couple of factors in play with any research, including fusion. If there's money to be had for funding then somebody will research it.
But another more nefarious factor is the nexus of fusion energy research and nuclear weapons research [1]. To build and maintain a stockpile of nuclear weapons (specificially thermonuclear weapons) you need appropriate trained nuclear energy physicists.
But another more nefarious factor is the nexus of fusion energy research and nuclear weapons research [1]. To build and maintain a stockpile of nuclear weapons (specificially thermonuclear weapons) you need appropriate trained nuclear energy physicists.
[1]: https://thebulletin.org/premium/2024-11/the-entanglement-of-...